In preferences_network.cpp, the CloudStorageAuthenticate::passwordChangeSuccessful
signal was connected to the PreferencesNetwork::passwordUpdateSuccessful
slot. This never worked, because passwordUpdateSuccessful() was declared
as a normal member function, not a slot (hooray for Qt's weird runtime-checked
signal system).
While touching this code, change the weird SIGNAL/SLOT macros to
actual member function, to at least get *some* compile-time checks.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>