Improved which angles should allow the side menu to open, depending if
it’s a left or right menu. Also check if the distance of the drag is
longer than a side menu would get. For example, scrolling vertically
for a long ways would have a long distance, but triggering a side menu
to open would be a short distance.
Also ensure that a side menu can always be closed incase something goes
wrong.
Closes#5272
72699dbbb4