* add button for languages setting
* build a web module for the dashboard
- load all python module from local dir
- initialize Blueprint and Babel
* set a default key for secure cookies
* add translations to docker container
* improve translation build
- clean target erases the *.pot
- don't modify the resurt of url_for() calls
- don't translate the language description
* translate connection table, fix icon
* build relative urls for HA ingress
* fix unit test, increase coverage
* design counter on connection board
* display time of last update and add reload button
* chance `Updated` field to a real button
* Provide counter values for the dashboard
* change background color ot the top branch
- use dark-grey instead of black to reduce the contrast
* change color of counter tiles
* test proxy connection counter handling
* prepare conn-table and notes list building
* remove obsolete menue points
* store client mode for dashboard
* store inverters serial number for the dashboard
* store inverters serial number
* build connection table for dashboard
* add connection table to dashboard
* fix responsiveness of the tiles
* adapt unit tests
* remove test fake code
* increase test coverage, remove obsolete if statement
