Small feature request: select all/deselect all video sources

[shadow-archetype]

I'm not sure which board to use for feature requests for the software itself.

As much as I love MakeMKV (I bought a license) there's one small thing that annoys me that I think would be easy to fix.

After scanning the disk, there's a panel to select video sources by checkbox. All are selected by default, and you have to unselect them one at a time.

My feature request is to add select all and deselect all buttons, so if all you want is the main title among 20 or so sources, you only need to click once.

[flojo]

There's a option in the right-click menu.

Although I do think the default should be everything unselected.