0.02: Now refresh battery monitor every minute if LCD on
0.03: Ensure redrawing works with variable size widget system
0.04: Fix regression stopping correct widget updates
0.05: Don't show clock widget if already showing clock app
0.06: Use 7 segment font, update *on* the minute, use less memory
0.07: allow turning on/off when quick-switching apps
0.08: Ensure we clear the whole rect so we don't end up leaving old text when time changes (fix #3073)