Added BatteryLevelDigits_210_v2 (currently just v1 copy)
BatteryLevelDigits_210_v2: added possibility to retain stock icon

Code still doesn't respect this
BatteryLevelDigits_210_v2: fixed code to allow stock battery icon
BatteryLevelDigits_210_v2: some more fixes; store correct offset
BatteryLevelDigits_210_v2: allow disabling digits
BatteryLevelDigits_210_v2: support bluetooth icon, and minor changes
BatteryLevelDigits_210_v2: fixed typo
BatteryLevelDigits_210_v2: fixed mask for bluetooth_connection_service_peek
BatteryLevelDigits_210_v2: fixed bluetooth icon mask
BatteryLevelDigits_210_v2: fixed rect-working instructions to use existing ones
BatteryLevelDigits_210_v2: fixed naming logic for stock icon disabling
BatteryLevelDigits_210_v2: variable text field width
BatteryLevelDigits_210_v2: fixed push/pop syntax