UI: Add icons for new face set tools

This patch adds missing icons for the new sculpt face set tools, and
updates the mask icons to be more consistent with the changes.

Currently draw face sets and draw mask icons are inconsistent and don't
relate to drawing/painting masks or face sets. This commit makes the
icons consistent and reusable for future tools like sculpt vertex
colors.

Differential Revision: https://developer.blender.org/D8875

source/blender/editors/datafiles/CMakeLists.txt

@@ -742,9 +742,12 @@ set_property(GLOBAL PROPERTY ICON_GEOM_NAMES
   ops.pose.breakdowner
   ops.pose.push
   ops.pose.relax
+  ops.sculpt.border_face_set
   ops.sculpt.border_hide
   ops.sculpt.border_mask
   ops.sculpt.cloth_filter
+  ops.sculpt.face_set_edit
+  ops.sculpt.lasso_face_set
   ops.sculpt.lasso_mask
   ops.sculpt.mesh_filter
   ops.sequencer.blade