Clarify FIXME comments.

gfxmenu/gfxmenu.c

@@ -44,7 +44,7 @@ grub_gfxmenu_viewer_fini (void *data __attribute__ ((unused)))
 {
 }
 
-/* FIXME: 't' and 'c'.  */
+/* FIXME: Previously 't' changed to text menu is it necessary?  */
 grub_err_t
 grub_gfxmenu_try (int entry, grub_menu_t menu, int nested)
 {

gfxmenu/view.c

@@ -430,6 +430,9 @@ init_terminal (grub_gfxmenu_view_t view)
   grub_gfxterm_decorator_hook = grub_gfxmenu_draw_terminal_box;
 }
 
+/* FIXME: previously notifications were displayed in special case.
+   Is it necessary?
+ */
 #if 0
 /* Sets MESSAGE as the progress message for the view.
    MESSAGE can be 0, in which case no message is displayed.  */