[AppLauncher] Add animation to folder opening. Uninstall & remove button like in spec. No functionality(DBus?) and icons(Depends on fontAwesome) yet

[AppLauncher] Bugfix: app icons escaping when in AppSwitcher page and rotating from landscape to portrait

[AppLauncher] Bugfix: Icon images were duplicated when opening the folder just after opening application.

[AppLauncher] Change AppLauncher grid delegate to use Loader so in the future widgets could be used as delegate also.
Add scaling for not NemoMobile icons.
Code structure changes.
Improve folder support: Code structure changes, folder UI is more polished, add possibility to create folders, add to folder, change position inside of the folder, close the folder with InverseMouseArea/Lipstick.compositor.