- Added operator = implementation to rgb_color for convenience.

- Major cleanup of Appearance prefs - colors are now dynamically
  read from the app_server, and updating them also works, but
  triggers a bug: the state of the current window somehow gets
  confused, i.e. if I update the panel background color, for some
  reason the color of the BButtons in the appearance pref change color
  and also the textviews begin misbehaving. Have not yet tracked down
  the cause of this, but newly created windows after making the change
  do show up with the updated color and behave properly. Also vastly
  simplified the pref and cleaned up some obsolete definitions.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24185 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/GraphicsDefs.h

@@ -101,6 +101,12 @@ typedef struct rgb_color {
 	{
 		return *(const uint32 *)this != *(const uint32 *)&other;
 	}
+	
+	inline rgb_color&
+	operator=(const rgb_color& other)
+	{
+		return set_to(other.red, other.green, other.blue, other.alpha);
+	}
 #endif
 } rgb_color;