Make more use of control-groups instead of adding a manual alignment
class to each element. Surprisingly, this is slightly larger than the
previous .gz.html output, but not enough to not consider the readability.

Status page updated to take the lengthy hostnames and version strings
into an account, remove those from the sidebar.

Clean-up terminal module. Use the same style for both input and output,
move the terminal handler and debug handler into an appropriate .cpp

Generate explicit events. Don't have a separate group observer that
tracks deletion, but handle it immediately from the 'button' event

Replace kv array with a direct key updates. While the backed part still
must optimize for size, from this side we should operate on keys directly

Using a more 'specific' CSS rule to override it's width and height

- remove 'local' index and replace sensor code depending on it with the
  existing 'slot' aka 'magnitude index' used in value() and type()
- common method to store and retrieve ratios for voltage, current,
  active power and energy. default implementation is no-op, sensor
  should implement ratio adjustment & calculations to use 'slot' indexes
- re-implement 'expected' values ui. display the actual ratio values,
  and have a separate page for updating them in a more apparent way
- remove legacy settings that were adjusting expected values
- remove legacy settings that were resetting ratios and analog calibration
- generic webui action caller, add ratios and analog calibration resets

all of 'emon' sensors were updated to utilize the new approach to the
ratio handling. pulsemeter is somewhat an outlier, but it is unclear
whether removing the energy ratio is justified

terminal part was also updated
- implement `expected` command that hooks into the new ratioFromValue
  (and what webui uses to calculate ratios)
- implement `energy` command to list only MAGNITUDE_ENERGY
- remove old pzem004t commands doing ratio reset and total energy count

another global update is related to espurna::duration
- rework module-local heartbeat and led durations into a global
  espurna::duration
- update sensor internals to use specific units instead of multiplying things
  on line-by-line basis. export count() to the api

Generic way to find out which units the magnitude type supports.
Clean-up UI related to temperature, energy and power units.
Resolves #2482

Also apply some refactoring to the 'schema'-generated
payloads by using the EnumerableConfig helper class.
Class received some new features:
- optional callback, verifying that index should be used at all
  specific use-case is magnitudes list that needs only 'counted' ones
- std::iota / ranges::iota_view -like helper object for sequences
  starting with something other than 0

Reordered payloads, prefer queueing over sending everything at once.

Refactor WebUI:
- remove jquery dependency from the base custom.js and use vanilla JS
- remove jquery + jquery-datatables dependency from the RFM69 module
- replace jquery-datatables handlers with pure-css table + some basic cell filtering
  (may be incomplete, but tbh it is not worth additional 50Kb to the .bin size)
- introduce a common way to notify about the app errors, show small text notification
  at the top of the page instead of relying on user to find out about errors by using the Web Developer Tools
- replace <span name=...> with <span data-settings-key=...>
- replace <div> templates with <template>, disallowing modification
  without an explicit DOM clone
- run `eslint` on html/custom.js and `html-validate` on html/index.html,
  and fix issues detected by both tools

Streamline settings group handling in custom.js & index.html
- drop module-specific button-add-... in favour of button-add-settings-group
- only enforce data-settings-max requirement when the property actually exists
- re-create label for=... and input id=... when settings group is
  modified, so checkboxes refer to the correct element
- introduce additional data-... properties to generalize settings group additions
- introduce Enumerable object to track some common list elements for
  <select>, allow to re-create <option> list when messages come in
  different order

Minor fixes that also came with this:
- fix relay code incorrectly parsing the payload, causing no relay names
  to be displayed in the SWITCHES panel
- fix scheduler code accidentally combining keys b/c of the way C parses
  string literals on separate lines, without any commas in-between
- thermostat should not reference tmpUnit directly in the webui, replace with
  module-specific thermostatUnit that is handled on the device itself
- fix index.html initial setup invalid adminPass ids
- fix index.html layout when removing specific schedules

update to terser v5
replace gulp-remove-code with a rough equivalent in the gulpscript itself
replace gulp-inline with gulp-inline-source-html
remove base64 modules as redundant when running inline-source (does both)
remove crass as redundant when running inline-source (uses csso)
fixup jquery source map comment (but still keep the actual file)

at least now this seems stable enough to start more of the ui tweaking

ref. https://github.com/xoseperez/espurna/issues/1132#issuecomment-431868924
it is slightly bigger, but better looking and no jquery dependency

rework colorpicker style as well, hide to prevent sending garbage when
lights are off. update lights module to send `lightState()` and separate
state from status payloads

yes, input[type="color"] is an option, but it does not look good

Port of https://github.com/Vasil-Pahomov/ArWs2812 from Arduino to ESP8266
Implementing garland of WS2812

Co-authored-by: Dmitry Blinov <dblinov@blackberry.com>

* Completed kingart curtain switch support:
Added Web UI controls and view in status
Added power up behaviour (nothing, close, open, last position)
Added curtain style (Roller, etc...) for UI status and to be used in MQTT

* Checked commit before PR. Added html gulp static files generated.

* Corrected a code refactor error which make the MQTT messages not handling position from received messages. Added comment to debug tab to show how to enable debug

* Use the maximum compression for gzip. A byte is a byte :)

* Update code/espurna/curtain_kingart.cpp

Co-authored-by: Max Prokhorov <prokhorov.max@outlook.com>

* Variable name prefix update
Added public set position function and curtain count

* Added Scheduler new type : curtain

* Add curtain schedule support and correct the 12h bug when adding a slot (00:00 after refresh). Default Hour is 12h

* Code cleaning.
Schedule support.
Light support is having an issue with new schedules corrected here.

* I let do better by the specialists

* Curtain init statues

* Coding style corrections

* Removed debug stuff from now - will be back later with the right way

* rebuild webui

* revert 435f1c5e03 schHour default, rebuild ui

Co-authored-by: Eric Chauvet <eric.chauvet@test-tree.com>
Co-authored-by: Max Prokhorov <prokhorov.max@outlook.com>

* RPN rules (WIP)

* RPN rules web interface, MQTT inputs

* Stickyness, rpn.ops,...

* Perform light updates only when value changes

* Improve wsSend performance

* Revert PR test

* Check TERMINAL_SUPPORT for _rpnInitCommands and remove unused variable

* Fix merge

* formatting

* disable by default (?)

* changelog

* comment

* remove debug function wrappers in favour of var activation

* fixup! comment

* Add "Enable Thermostat" switch

* Add heater/cooler thermostat mode

* revise first-time-use screen
* generate password (policy applies)
* hide/reveal password text for sta/admin settings
* changed autocomplete='...' for some inputs to avoid completion

improved CSS to comply with CODACY rules

also minor html fixes

This reverts commit 8da3f54e91.