Fix charcell %pb and %pf tags, FS#11592
This also moves draw_player_fullbar() and draw_player_progress() from skin_display.c to skin_tokens.c. Charcell is a bit different from bitmap here because drawing a progress bar is a combination of setting up the LCD controller (custom characters) and providing a format string. The custom character definition might fit in skin_display.c, but the format strings are needed in skin_tokens.c. Putting these functions in skin_tokens.c seemed to fit better.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28241 a1c6a512-1295-4272-9138-f99709370657