added css to popup editor
added css to popup editor

brandonnchoii/VOOGASalad,keikumata/CS308_Tower_Defense,PinPinx/TD_Game_Engine,keikumata/CS308_Tower_Defense,brandonnchoii/VOOGASalad,Jgilhuly/VoogaSalad,jeremydanielfox/game_engine,ninasun/game_engine,PinPinx/TD_Game_Engine,jeremydanielfox/game_engine,ninasun/game_engine,Jgilhuly/VoogaSalad