QuietHours: added option for muting system sounds
Allows muting following system sounds during quiet hours:
- dialpad tones
- touch sounds
- screen lock sound
- volume adjust sound
- GravityBox charger sounds

Inspired by SlimKat
Update strings.xml
Update strings.xml
Merge pull request #1091 from liveasx/patch-103

Update strings.xml
Updating Russian
Merge pull request #1092 from gaich/patch-8

Updating Russian
Updated Japanese Translation
Merge pull request #1093 from WedyDQ10/patch-20

Updated Japanese Translation
Power: added option to ignore proximity wake-up for incoming call
UNC: changed unit for alert only once interval
- allows interval smaller than 1 minute (min. 5 secs)
- max value reduced from 1 hour to 30 minutes
Updated Slovak and Czech translations
Updated Portuguese (PT) translation
Update strings.xml
Merge pull request #1094 from gaich/patch-8

Updating Russian
Settings: don't crash if device has no proximity sensor
Version 3.4.4 [KK]
Update for hungarian translation
Merge pull request #1097 from benjoe1/patch-37

Update for hungarian translation
Updated French translation [KK]

QuietHours: added option for muting system sounds
Power: added option to ignore proximity wake-up for incoming call
Merge pull request #1098 from ch-vox/patch-68

Updated French translation [KK]