Multiple UX fixes

[Pierre-Gilles]

Pull Request check-list

To ensure your Pull Request can be accepted as fast as possible, make sure to review and check all of these items:

• If your changes affects code, did your write the tests?
• Are tests passing? (npm test on both front/server)
• Is the linter passing? (npm run eslint on both front/server)
• Did you run prettier? (npm run prettier on both front/server)
• If your changes modify the API (REST or Node.js), did you modify the API documentation? (Documentation is based on comments in code)
• If you are adding a new features/services which needs explanation, did you modify the user documentation? See the GitHub repo and the website.
• Did you add fake requests data for the demo mode (front/src/config/demo.json) so that the demo website is working without a backend? (if needed) See https://demo.gladysassistant.com.

NOTE: these things are not required to open a PR and can be done afterwards / while the PR is open.

Description of change

Please provide a description of the change here. It's always best with screenshots, so don't hesitate to add some!

[codecov]

Codecov Report

Merging #590 into master will decrease coverage by 0.03%.
The diff coverage is 53.84%.

@@            Coverage Diff             @@
##           master     #590      +/-   ##
==========================================
- Coverage   91.92%   91.89%   -0.04%     
==========================================
  Files         396      396              
  Lines        4819     4824       +5     
==========================================
+ Hits         4430     4433       +3     
- Misses        389      391       +2

Flag	Coverage Δ
#server	91.89% <53.84%> (-0.04%)	⬇️

Impacted Files	Coverage Δ
...erver/services/philips-hue/lib/light/light.poll.js	100% <ø> (ø)	⬆️
server/services/sonoff/lib/handleMqttMessage.js	100% <ø> (ø)	⬆️
server/services/philips-hue/lib/models/white.js	100% <ø> (ø)	⬆️
...ces/philips-hue/lib/models/colorWithTemperature.js	100% <ø> (ø)	⬆️
server/utils/constants.js	100% <ø> (ø)	⬆️
server/api/middlewares/authMiddleware.js	100% <ø> (ø)	⬆️
...rvices/zwave/lib/events/zwave.controllerCommand.js	100% <ø> (ø)	⬆️
...ces/philips-hue/lib/models/whiteWithTemperature.js	100% <ø> (ø)	⬆️
server/api/websockets/index.js	32.2% <0%> (ø)	⬆️
server/services/philips-hue/lib/light/index.js	100% <100%> (ø)	⬆️
... and 2 more

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