Turn off dragging when a in-game popup / menu is shown.

Fixes ticket:2086

git-svn-id: https://warzone2100.svn.sourceforge.net/svnroot/warzone2100/branches/2.3@11565 4a71c877-e1ca-e34f-864e-861f7616d084
(cherry picked from commit 686927f2a4626c56e218c92b83cf15e747f180f8)

src/display.c

@@ -462,6 +462,11 @@ void processInput(void)
 	BOOL mOverRadar = false;
 	int WheelZoomIterator;
 
+	if (InGameOpUp || isInGamePopupUp)
+	{
+		dragBox3D.status = DRAG_RELEASED;	// disengage the dragging since it stops menu input
+	}
+
 	if(radarOnScreen && getHQExists(selectedPlayer) && CoordInRadar(mouseX(), mouseY()))
 	{
 		mOverRadar = true;