Loss of borders around generated PDF thumbnails

Submitted by Michael Roberts

Assigned to Jannis Pohlmann

Link to original bug (#12208)

Description

With version 0.1.31 (which I cannot select above), there is no longer a border drawn around generated PDF icons. This make it particularly hard to see the icons, which generally have a white background, when thunar also has a white background. Reverting to version 0.1.30, wiping the thumbnails in ~/.thumbnails and ~/.cache/thumbnails, and restarting tumblerd returns the generation of the borders.