resolve #2327, #2220

- remove legacy support in the webui
- format datetime strings on the device, use NTP panel to display them both
- migrate from the old ntpOffset + ntpDST + ntpRegion to ntpTZ

- support 32 byte hostname / ssid
- support 64 byte passphrase
- slightly reduce amount of memory allocations
- tweak initialization paths to call persistent(false) as early as possible

* wip

* template common operation

* more

* ui

* fix naming issues

* remove old constraints

* oops

* dummy sensor

* rearrange bmx280 magnitudes

* 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>