Release 3.5.1

Merge pull request #132 from weblate/weblate-vikdevelop-timer

Translations update from Hosted Weblate

Merge pull request #130 from weblate/weblate-vikdevelop-timer

Translations update from Hosted Weblate

add new screenshots

Update main.py

Update com.github.vikdevelop.timer.metainfo.xml

Update com.github.vikdevelop.timer.gschema.xml

Merge pull request #119 from weblate/weblate-vikdevelop-timer

Translations update from Hosted Weblate

update rel notes

Update main.py