controlled independently from whether there is a background bitmap. (grub_gfxterm_fullscreen): Change blend_text_bg when changing bitmap. (destroy_window): Likewise. (grub_gfxterm_background_image_cmd): Likewise.
controlled independently from whether there is a background bitmap. (grub_gfxterm_fullscreen): Change blend_text_bg when changing bitmap. (destroy_window): Likewise. (grub_gfxterm_background_image_cmd): Likewise.