plotter settings: what does "reset" even do?

[i-make-robots]

Steps to make the bug happen

1. Go to settings > plotter settings
2. Click on reset.
3. change something.
4. Click on reset.

What was supposed to happen
I don't know. it doesn't appear to do anything.

Platform (please complete the following information):

• Version: 7.49.2

Log file

[i-make-robots]

If I change some value and DO NOT hit save, then press reset it will undo the change. If I hit save then reset will have no effect.

It will also reset all four tabs in the sunken area of the panel.

[i-make-robots]

in b9724bb i hide the save/reset buttons on ancestors.

[i-make-robots]

reset now returns settings to progenitor values