Bauh

Features
- New environment variable / parameter to set a custom QT theme for the application: BAUH_THEME (--theme)
Fixes
- wrong management panel resizing for some scenarios
- bad application theme when fusion or breeze are not set as default QT theme / style

Improvements:
- suggestions are now retrieved asynchronously taking 45% less time.
- search response takes an average of 20% less time ( reaching 35% for several results )
- app boot takes 98% less time when snapd is installed, but disabled
- BAUH_TRAY (--tray) is not enabled by default (0).
Fixes
- not showing correctly the latest flatpak app versions when bringing the search results
- flatpak client dependency