disable reflow options when reflow is not ON

This should also fix #1061.

frontend/ui/widget/container/framecontainer.lua

@@ -57,6 +57,11 @@ function FrameContainer:paintTo(bb, x, y)
             container_width - 2*self.bordersize,
             container_height - 2*self.bordersize)
     end
+    if self.dim then
+        bb:dimRect(x + self.bordersize, y + self.bordersize,
+            container_width - 2*self.bordersize,
+            container_height - 2*self.bordersize)
+    end
 end
 
 return FrameContainer