because there is no sidebar anymore.
Several different margins and linings were created depending on the
side, not depending on where it belongs.
Contributes to CURA-5784.
Most stuff here was recently changed. Some of it was where I found a pattern in something that was likely copy-pasted from somewhere else, so I did a global search and replace on that.
Contributes to issue CURA-5784.
This is more efficient, because we're not writing every time you modify the list of scripts. It's also more complete, since if you don't modify the list of scripts but just modify one of the settings, that setting change also gets written to the stack after closing the window.
