Allow for combination of settings

[Jodsderechte]

Describe the solution you'd like
Currently every setting takes the whole width of the editmode window. It would be nice if we could make combo window like "Checkbox + Slider" to turn options on and off (or in any way combine different options) similar to Ace "width" parameter.

Describe alternatives you've considered

[p3lim]

Those would have to essentially duplicate the widgets as it stands right now, something I'm not a big fan of. There's nothing technically blocking this, but the solution with how LEM works right now would be incredibly ugly/hacky.