Blender Git Loki

UI: Sequencer: Fix placement of display options in sequencer & preview mode

This commit does two things, first it removes the proportional editing tool settings.
This is not accessible code and is has not been used since the grease pencil/annotations changes in 2.8.

Second, this patch reorders the if statements so that the display options are always shown on the rightside.

Reviewed By: antoniov

Differential Revision: https://developer.blender.org/D12163