Reset Setting to Default

[akrigline]

Is your feature request related to a problem? Please describe.
It is frustrating to try testing setting defaults because as soon as the setting exists, that default is not applicable.

Describe the solution you'd like
A button which allows a given setting to be 're-set' to the default on the module settings page.

Describe alternatives you've considered
Something which allows a key to be entered or even autocompleted that would let this work for non-config-able settings.

[akrigline]

this lets you set a setting to its default:

game.settings.set('gm-screen', 'rows', game.settings.settings.get("gm-screen.rows").default)