Add preference to check for new version on launch

First time contributor checklist

• I have read how to contribute to this project
• I have read the code of conduct to this project

Contributor checklist

• I am targeting the master branch and not the release branch (⚠️ very important)
• I have tested my contribution using ./run.sh
• I have tested my contribution using ./build.sh --flatpak-local --flatpak-install
• My contribution is fully baked and ready to be merged as is
• I ensure that all the open issues my contribution fixes are mentioned in the commit message of my first commit using the Fixes #1234 syntax

---

Description

Adds a new preference switch to enable/disable the checking of new releases. This is useful in cases where users (me 😄) do not wish to receive a notification every time the application launches (at login for me) about a new release. I let pacman manage my versions for me.

This fixes #116 (closed)

Type of Changes

	Type
✓	✨ New feature

Related Issue