[Feature Request] Allow making a system wide component from an existing screen element

[KallDrexx]

Sometimes you set up elements on one screen, and realize you want to repeat those elements on other screens. You can manually copy/paste from one screen to the other, but it can also make sense to make a system wide component out of that element, so that it's centrally managed for all screens it's relevant on.

This is important because it's not trivial to see the values you set for an existing element when trying to recreate it for a new component.