calendarGUI: show more information on date difference tool.
Remind users how to adjust the clock on major DST start/end dates.
homeGUI: change the way the clock adjustment message on DST dates is displayed.
Add and use helper function for converting to smaller characters.
Fix graphic glitch on the file manager status bar, by using smaller characters.
Avoid the use of Bdisp_AllClr_VRAM on the main file manager screen.