2d7be7a0e3
So far, the PreferencesDialog emitted a settingsChanged signal. This meant that models that listened to that signal had to conditionally compile out the code for mobile or the connection had to be made in MainWindow. Instead, introduce a global signal that does this and move the connects to the listeners to remove inter-dependencies. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>