config: add option to disable mode change notifications (#235)
config: add option to disable mode change notifications (#235)

* config: add option to disable mode change notifications

* config: don't do extra work

* config: handle none, default and custom

* config: cleaner

russellhancox/santa,tburgin/santa,tburgin/santa,russellhancox/santa,google/santa,google/santa,google/santa,tburgin/santa,russellhancox/santa