UI: Create unique/theme matching checkboxed

[lostdesign]

The default chrome checkboxes dont really match the theme, could be integrated into the current selected theme.

[spirulinax]

Hi, is this a hacktober fest 2021 issue?

[lostdesign]

@spirulinax sure thing, you are more than welcome to tackle this issue.

I can work on this when I finish the auto-updater PR's front end! Is there a design for the checkboxes already? I'm not too good at design yet.

[AdityaSurve]

Hello! I can give it a try. Could you assign it to me?