Update strings.xml

Updated italian translation to 2.5.1
Option for overriding default touch/long-touch behaviour of tiles
- wifi on/off on touch; wifi settings on long-touch
- BT on/off on touch; BT settinngs on long-touch
- RSSI (mobile signal): data on/off on touch; data usage on long-touch
- Airplane mode: turn on/off on touch
Merge pull request #100 from pitone02/patch-3

Update strings.xml
Merge pull request #102 from bgcngm/master

Updated Portuguese (PT) translation
Fixed errors in Italian translations
Updated French translation
Make alternative GPS and Ringer mode tiles available also for MTK
Why not?
These can be used to replace standard GPS tile and Audio Profile tile.
Merge pull request #103 from ch-vox/patch-36

Updated French translation
Network mode tile: added 2G/3G mode option
- plus added (LTE) to strings for users with devices having LTE
to better understand how modes work
Network mode tile: option to choose SIM Slot to which tile applies (MTK
Dual SIM specific)
Improved option for disabling slow 2G tile warnings
Make Pie Controls more intelligent
Linked to Expanded Desktop. Allow 4 Pie Controls modes
1) Disabled - completely off
2) Always - always on
3) When expanded desktop on - when expanded desktop turned on regardless
in what mode
4) Only when expanded desktop is set to hide navigation bar
Update Russian translation 2.5.1
Merge remote-tracking branch 'upstream/master'
Updated Russian translation 2.5.5
Merge pull request #104 from romashko/master

Updated Russian translation
Move navbar transparency settings under Navbar tweaks section
Updated Portuguese (PT) translation
Coherent menu levels for transparency management
- Statusbar transparency management was already under
  "Transparency management" menu
- Navbar transparency management moved also to same menu level