0.02: Now refresh battery monitor every minute if LCD on
0.03: Tweaks for variable size widget system
0.04: Ensure redrawing works with variable size widget system
0.05: Change color depending on battery level, cloned from widbat
0.06: Show battery percentage as text
0.07: Add settings: percentage/color/charger icon
0.08: Draw percentage as inverted on monochrome battery