Created attachment 6909 Patch to fix the clear button With current master and libxfce4ui-4.13.x the "clear" button in the "clear known indicators" confirmation dialog is missing the label and is consequently empty (see screenshot attached). The bug attached fixes the erroneous behavior by not relying on gtkstock anymore, but instead defining the correct generic icon name and (translatable) label.
Created attachment 6910 Screenshot showing the problem
Thanks. Pushed to master.