🗲FLASH WITH A BROWSER🗲

Changes:

fixed STE not working, revert to standard squelch tail (ENABLE_CTCSS_TAIL_PHASE_SHIFT = 0)
fixed another bug in RSSI calibration
display and allow input of >1GHz frequencies (press band switch on F6 band or manually input all 9 to get into the 1GHz range, the input box switches modes and allows input of an extra digit)
reduce EEPROM wear by not overwriting unchanged data
extra side-key functions: key lock, switch VFOs
copy channel to frequency mode changed from long press MENU button to 1 BAND function button
added menu configurable long-press function for MENU button (menu: M Long)