Prompt user to save modified settings.
# S3 method for Settings
promptAndSave(this, saveOption="saveSettings", settingsName=NULL, ...)A character string of the option used to set
if user is prompted or not.
Arguments passed to saveAnywhere().
Returns TRUE if settings were successfully written to file,
otherwise FALSE is returned. An exception may also be thrown.
If settings has been modified since loaded, the user is by default
prompted to save the settings (if R runs interactively).
To save or not save without asking or when R runs non-interactively,
set option "saveSettings" to "yes" or "no", respectively.
For prompting the user, use "prompt".
*isModified().
interactive().
For more information see Settings.