Feature Request: Enable cross-machine config management.

[brimston3]

I use git to propagate my dotfile configurations between multiple machines but doing so with retext's ~/.config/ReText project/ReText.conf causes issue as opening new files or switching tabs updates the config (eventually, once QSettings pushes it down to the disk).

Please consider separating the "internal options, never set manually" recentFileList, lastFileList, lastTabIndex and windowGeometry into their own configuration file.

Alternatively, allow me to populate a second, shared config file and use QSetting's fallback mechanism to override shared settings locally.