Change date and time pickers into datetime popup.
Upgrade date picker design.
Fix time picker design to follow popup layout.
Fix audio video conference URI migration in linphonerc and avoid to replace it if it already exists (same for conference URI).
Remove binding loop warning on combobox.
In meeting creation, format dates to system and fix combobox display.
Lighter borders in conference creation.
Timepicker : highlight button with circle and same color, add 5 minutes.
Fix gray mask/mouse area on recent contacts in chat creation when already selected.
