Translations update from Hosted Weblate (#478)

Translations update from [Hosted Weblate](https://hosted.weblate.org)
for [vikdevelop/Save
Desktop](https://hosted.weblate.org/projects/vikdevelop/savedesktop/).



Current translation status:

![Weblate translation
status](https://hosted.weblate.org/widget/vikdevelop/savedesktop/horizontal-auto.svg)

Final changes before release v3.8

Change a condition in the flatpaks_installer.py script

Fix a bug with saving unencrypted periodic saving file

Remove unnecessary strings from GSchema file and add minor changes in…

… archive.py

Cleanup and UX improvements

Attempt to fix snapcraft.yaml

Update savedesktop.in

Fix a bug with showing self.switcher_bar on bigger screens

Update main_window.py

fix desktop-file-validate error