Changes:
1. States of buttons(hover, tooltip etc...) were not/not always correctly reset and still displayed when changing GUIPages. 
	Example1(menu): Click "Learn to Play" in the main-menu. "The 0 A.D. Game Manual"-tooltip is still displayed in the background
	Example2(ingame): 
		1. Select a unit 
		2. hover the idle-worker-button
		3. Hit "Delete" 
		4. Click "No" without moving the mouse
		5. The idle-worker-button has still the hovered-style and the tooltip ("find idle worker") is displayed. 
	 
2. Minimap improved
Left-click-dragging out of the minimap bounds is now possible

3. Zoom-out bug resolved
When moving too close to the map bounds(actually out of the bounds), the camera's zoom changed.
It mainly happens on top of the map. One example how this could be done was by using the arrow-keys for navigation.

4. Feedback controls were set to hidden=true/false in every tick
It's not necessary to do this in every tick. It's now changed, but probably won't make much of a difference.

5. Some other minor improvements


Not resolved:
1. On Windows when playing in windowed mode and leaving the window with the mouse pointer, the game still stops receiving mouse-events.
On Linux it works exactly how it should...
I didn't yet try to solve this problem.