[LH4755] Change Left/Right or Top/Bottom prompts for settings restart

I noticed this change which adds Top/Bottom to options->appearance>Main Editor

When I change either left/right or top/bottom scrivener prompts “Scrivener needs to be restarted for some of the new settings to take effect.” However, after changing either of those settings, the change is immediately reflected in the editor screen. I am not sure that the restart prompt is valid.