DescriptionDialog-apply.svg An icon from the GNOME-colors 2.5 icon theme. Date 4 June 2008 (last updated Oct 24 2008) Source http://www.gnome-look.org/content/show
DescriptionOxygen480-actions-dialog-ok-apply.svg Icon from the Oxygen icon theme. Date from 11 January 2008 until 11 November 2014 date QS:P,+2050-00-00T00:00:00Z/7
DescriptionFaenza-dialog-apply.svg Icon from the Faenza theme, version 1.3. Date 16 December 2012 Source https://code.google.com/archive/p/faenza-icon-theme/downloads