As mentioned in the #2491
Hides parent element when these groups are empty

IKEA Vindriktning Air Quality Sensor
https://www.ikea.com/gb/en/p/vindriktning-air-quality-sensor-80515910/

Added support for Itead Sonoff POW R3 (https://itead.cc/product/sonoff-powr3/)

This device is essentially the same as the POW R2, except:
- the relay is a normally closed type,
- the current and power ratings of the device are higher.

fixes #2491

While I am still hesitant to call this an improvement,
at least this makes part of the installation slightly faster

since it won't decide between String and StringView,
manually direct it to the StringView

also normalize token values of particle measurements

Bumps [minimist](https://github.com/substack/minimist) from 1.2.5 to 1.2.6.
- [Release notes](https://github.com/substack/minimist/releases)
- [Commits](https://github.com/substack/minimist/compare/1.2.5...1.2.6)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

clangd does not like integer SUPPORT flags and `||`

amends e51e259f02
fixing incorrect conversion from kelvin, and also add full
conversion from possible farenheit source (if that ever happens)

experimenting with the idea of unit conversion... while a table-like
approach will work and will be slightly shorter, it would not have the
specific type checks and constexpr still does not play well with lambdas

plus, any conversion function referenced as a pointer will not really
be a constexpr (...and still require c++17 to work correctly when iterating)

cursor no longer calculates 'offset' but stores the absolute position
this also helps not introducing that specific math to the outside code

more const-correctness fixes and general accessors instead of plain structs
access and modification, where specific ctor or helper method should've
been used instead

Restore behaviour from dd12251e43
7ba1283024 unintentionally removed it
Instead of reverting to the 'atof' code, just use the provided string
as-is via RawJson (aka `serialized()` in the v6)

Note that the old approach may have caused some silent data loss b/c the
data could have been stored in 'double' or 'u64', where the ArduinoJson
only stores 'u32' and 'float' in it's internal buffer and does not (really)
warn us about any type incompatibilities.
(at least by default. but, the alternative is to store all floating point
numbers as 'double' internally, see ArduinoJson/Configuration.hpp)

resolves #2503

both heap size values should be u32

removes the extra 'save' button from the ui and the code that handles it
also make sure to use the updated foreach_prefix when looking for the
match in the settings

resolve #2502

Cursor is in a weird spot, by being both the pointer to the data and the
read-range that is used of specify the range in which we operate
Next TODO would be to move even more things to 'const', but that would
at least require to rework the cursor object and also remove it from the
members list.

Also, try to fix the API helper objects to persist the referenced struct
(best effort only, though, it is still possible to break things when not careful)

also rework internals of the analog and ntc sensor classes to use
explicit delays and update it's comments

combine code/.gitignore and the one at the root of the repo

.bandit was part of codacy checks suite, current python code
should probably be updated to use either pylint directly and (/ or)
through the codeql python workflow