Summary:
Besides the move which really allows to have singleton throughout all
shared objects and libraries of the application, I moved all additional
settings function into the KMyMoneySettings object. This allows to
remove the KMyMoneyGlobalSettings class completely.

Compiling this in an existing build directory may cause trouble as some
old generated files are left behind and might be used instead of new
ones. You have been warned.

Reviewers: wojnilowicz

Differential Revision: https://phabricator.kde.org/D10161