Some scene editor enhancements.

Added Shift+Mousewheel as faster alternative to E and R for tile selection
(had to change the undocumented and probably unused Shift+R action to Alt+R).

Allow applying element effects (numpad 0-9) to multiple selected tiles,
and not only one.

A new node does no longer have "NewPath" as default text when created,
which always forces the user to hammer backspace 6 times before own text can be entered.

Aquaria/Game.h

@@ -516,6 +516,7 @@ protected:
 	void changeShape();
 	int skinMinX, skinMinY, skinMaxX, skinMaxY;
 
+	void setGridPattern(int gi);
 	void setGridPattern0();
 	void setGridPattern1();
 	void setGridPattern2();