- Resolves: #204

- Resolves: #358

The C++ library does interpret anything as strings, we want to keep the
orignal json types.

- add some extra debug info for troubleshooting start errors
- fix vendors labels

Also disable autostart if manual quit, remove custom printer that was
used for i18n and disable previous autostart if -disable-autostart

We didn't disable autostart after the migration to qt.

- Resolves: #355 #289

- Resolves: #326

- Resolves: #334

Let's close properly without segfaults :)

It lacks authentication, and I need to debug a segfault/abort when
quitting. But kind of useful for demonstration purposes.

- Resolves: #243

just a minimal boilerplate. the idea is to import the qml files and
assert that the states/widgets change accordingly if we mock the backend
status.

- Closes: #300

- simplify notification routine (we dont need no rejected action). we
  just check every hour, as in the original code.
- open links directly from Qt
- rename some global variables to make them less cryptic
- move cleanup function to the same module that created them