Hi,
Recently I noticed that the following icons don't appear when inactive at the Sort by menu. When the library is sorted by one of these, I get the checkmark/ok icon, but if they're not the currently chosen sort column, I find the blank spaces somewhat displeasing:
Date
Id
Modified
Published
Size
Title
For date columns, I find the scheduler.png icon a suitable override, though I can't figure if it's possible to place custom icons for them in resources/images.
