lcd/lcd: fix typo in xy to rc conversion
conv/bcd: fix ones place bug in bcd_encode_packed
lcd/lcd: make state structs static
ui: implement time page
ui/time: adjust behavior of time stoppage during setting
ui/time: change min year to 100 (2000)
ui/time: simplify time stoppage mechanism
rtc/rtc: add debug statements
rtc/rtc: filter incoming data bits
button/button: rename button_event function to button_pump