ENH: Allow working with empty build directories.

Make output window a bit smaller compared to cache view.
      Prompt on X'ing window as well as hitting cancel.
      Color new cache values red, and put them first.

Source/QtDialog/QCMakeCacheView.h

@@ -73,6 +73,7 @@ public:
 
 protected:
   QCMakeCachePropertyList Properties;
+  int NewCount;
   bool IsDirty;
 };