7db72b Replace RGBM and fix typos (#2551)

4 files Authored by artisteacher 5 years ago , Committed by Jeremy Bullock 5 years ago ,
    Replace RGBM and fix typos (#2551)
    
    * Remove extra t from contain

    

    * Fix error message to use rgba

    

    * Fix label to use RGBA

    

    * Clarify send back menu item