Apply a few changes that were requested in the PR during the review.
# Conflicts:
# src/CMakeLists.txt
# src/displayapp/Apps.h
# src/displayapp/DisplayApp.cpp
# src/displayapp/Messages.h
# src/displayapp/screens/settings/Settings.cpp
Implements 'Airplane mode' feature to disable and enable bluetooth/ble
Adds airplaneMode as a non-persisted setting
Adds a setting menu for switching airplane mode on and off
Displays an airplane symbol on the Digital watch face and the
PineTimeStyle watch face when airplane mode is enabled
Always enables bluetooth/ble on boot (disable airplane mode)
Alphabetizes the settings menu options
Style cleanups
Closes#632
