Those columns are filtered with a JS function and the icons are automatically displayed as background images, which makes it impossible to easily display all the icons right after the column name when the name is left aligned.
However, in order to remove the big white space that can exist between the left-aligned column name and the icon (and which can sometimes be misleading), I've modified the style sheet to display the icon close to the column name in any case, which means:
- right after the column name if the column name is right aligned
- right before the column name if the column name is left aligned
In the Users page, arrows are displayed on the left instead of being displayed on the right in the Filters page for instance.