Update the appearance/functionality of the userbutton quite a bit in lumina-desktop.
1) Should now only reload the applications list if the installed apps changed recently, making the menu show up a ton faster.
2) Move the tabs over to the left side of the UI, and remove a lot of empty space.
3) Attempt to have the widget track the mouse and switch to a new tab on mouse-over instead of requiring a click (still in testing - no loss of functionality at the moment).