Settings Dialog sizing units are incongruent

Submitted by nPHYN1T3

Assigned to Xfce Bug Triage

Link to original bug (#16359)

Description

Size options in the panel settings are a mix of px and %. This causes problems for sizing and placement for screen sizes where a percent gives you odd/uneven sizes. I would like to set length as px as my screen size is 5760x2160. 6 1920 wide screens. Setting by % means I can not place and size the panel on a single screen because mathematically there is no way to. 1900.8 (33%) or 1958.4 (34%).

Version: 4.12.2