[PictureLoader] Allow saving downloaded images to local storage and not just the QNetworkManager cache (#6620)

* [PictureLoader] Allow saving downloaded images to local storage and not just the QNetworkManager cache.

Took 1 hour 11 minutes

Took 4 seconds


Took 25 seconds

* Give people options from a dropdown.

Took 1 hour 6 minutes

Took 3 seconds

* Simplify directory removal code.

Took 5 minutes

Took 8 seconds

* Merge pull request #8

* Create new category for new settings

* Split off storage settings

Took 47 minutes

Took 4 seconds

* Allow toggling between caching methods.

Took 1 hour 30 minutes

Took 9 seconds

* Adjust settings dialog.

Took 5 minutes

Took 59 seconds

Took 22 seconds

Took 6 seconds

* tr() strings

Took 1 minute

Took 6 seconds

* Readjust layout, default naming scheme.

Took 5 minutes

* Add stretch.

Took 9 minutes

* Make scrollable.

Took 2 minutes

* Add icon.

Took 7 minutes

* Change naming to be uniform.

Took 3 minutes

Took 3 seconds

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
Co-authored-by: RickyRister <42636155+RickyRister@users.noreply.github.com>

cockatrice/cockatrice.qrc

@@ -69,6 +69,7 @@
         <file>resources/config/interface.svg</file>
         <file>resources/config/messages.svg</file>
         <file>resources/config/deckeditor.svg</file>
+        <file>resources/config/storage.svg</file>
         <file>resources/config/shorcuts.svg</file>
         <file>resources/config/sound.svg</file>
         <file>resources/config/debug.ini</file>