Collapsible sidebar

New Feature

What does this MR do?

Add the ability to collapse & expand the devices menu sidebar.
It also remembers the last setting for convenience and added a keyboard shortcut.

Related issues

Resolves #42 (closed)

Checklist

• Application works as expected when running from source
• AppImage build compiles and runs successfully
• Flatpak build compiles and runs successfully
• [-] There are dependency changes
• Mock tests are successful (if applicable)
• Performance considerations have been taken into account
• This MR is ready to be merged