NXP-14471: Display dialog to notify that application has been updated
NXP-14471: Cleanup settings.py: remove standalone execution
NXP-14471: Cleanup settings.py: rename dialog class (to distinguish  it from other dialog classes)
NXP-14471: Cleanup settings.py: take advantage of QDialog.result()
NXP-14471: Cleanup settings.py: remove irrelevant app parameter from prompt_settings
NXP-14355: Rename 'update available' status constant
NXP-14355: Update systray icon when an update is available
NXP-14355: Cosmit
NXP-14355: Prompt for application update
NXP-14471: use constant for updated dialog height