AppMenu QML

This plasmoid shows a menu of the installed applications, similar to Lancelot but much simpler. The purpose of the simpleness is to have a faster plasmoid which also loads faster. The plasmoid also has a list of favorites and you can search applications by application name. There are "Lock Session", "Leave" and "Switch User" and other similar buttons. Other features:
- the number of visible columns can be changed (between 1 and 4);
- the favorites section can be hidden;
- the favorites list can be locked;
- the size of all visible icons can be changed;
- closing and opening the menu remembers its state (configurable);
- change launcher icon;
- configure which "leave" buttons are shown (or show none at all).

The plasmoid can be completely manipulated with the keyboard only except for the buttons at the bottom wich must be clicked with the mouse. The menu can be browsed with the arrow keys and PageUp and PageDown, a favorite can be added with the + or = key and removed with the - key, to search an application by its name, just start typing the name.

This plasmoid is entirely written in QML + JavaScript.

Note: this plasmoid requires KDE 4.8.0 or higher. For correct resizing of the "Leave" buttons, KDE 4.9.0 is required.

Bugs I don't have control over (because of limitations in Qt or Plasma):
- make configuring the plasmoid's icon more elegant by showing the current icon on the button that launches the "Change icon" dialog and by removing the text field holding the icon's name (only possible when KConfigXT finally supports Icon)
- provide a command line to open/close the menu
- add "Recent Documents" section (below Favorites?); there is no Plasma DataEngine for this, so I cannot do it
- allow to modify the ordering of the "leave" buttons (must find a way in
KConfig XT to do this)

version 1.5 (2013-02-12):
- fix bug: when the search text field is focused, pressing the left or right arrow key doesn't focus the menu, leading to unexpected behavior
- fix bug: if the search field is emptied (using the Backspace key) when an item in the search list is focused, then the main menu is not focused, so the left and right arrow keys don't work
- add option to hide the description in the menu items
- add option to check more thoroughly for empty submenus to hide them (by default some effort is already done to hide the empty submenus, but the search for empty submenus is not comprehensive); this however leads to a slower startup of the plasmoid
- when the plasmoid is added to the desktop and it is activated (using a keyboard shortcut), then the search field is automatically focused (this seems to work only when there are no open windows or when the dashboard is shown)
- restore feature: show tooltips for the "Leave" buttons when the text is not shown on them
- add Brazilian Portuguese translation (by André Marcelo Alvarenga)
- update French, German and Italian translation (by their authors)