Another (minor) one: when changing grid size, you have to press enter to commit the change, but if you just click ok, it retains the value in the edit box (from a UI perspective, it would make sense to commit the change when OK is pressed as well).
*EDIT*
And also, the default value for grid size is not shown, it instead says "textfield"
*EDIT*
And also, the default value for grid size is not shown, it instead says "textfield"