Update strings.xml
Merge pull request #1135 from liveasx/patch-109

Update strings.xml
HeadsUp: added option for Importance threshold
Allows to suppress heads up for notifications that are of low importance
(such as download completed, google now, ...). Importance threshold is
configurable allowing 3 levels: low, medium, high; including possibility
to completely turn off importance check.

For UNC, importance level is used for "Default" heads up mode thus won't
affect special heads up modes such as "Always", "Immersive"
Updated French translation [KK]

HeadsUp: added option for Importance threshold
Merge pull request #1137 from ch-vox/patch-72

Updated French translation [KK]
Updated Portuguese (pt-BR) translation

Updated Portuguese (pt-BR) translation
Merge pull request #1138 from wyghor/patch-15

Updated Portuguese (pt-BR) translation
GB Settings: small improvement regarding lockscreen prefs handling
HeadsUp: optimized preference handling
Avoid reloading preferences on each notification
UNC: fixed lights and vibrations behavior during quiet hours
ActiveScreen: added option for ignoring quiet hours
Allows active screen during quiet hours when enabled
Lockscreen: reload preferences when background option changes
Required after
https://github.com/GravityBox/GravityBox/commit/b4916f4eee68d3fe56018b59f62452143284be52