Feature request: Dyntopo detail expressed in percentage of brush radius.

Not sure how useful this will be but people have requested it so, here
it is...

release/scripts/startup/bl_ui/space_view3d_toolbar.py

@@ -1471,6 +1471,8 @@ class VIEW3D_PT_sculpt_dyntopo(Panel, View3DPaintPanel):
             row = sub.row(align=True)
             row.prop(sculpt, "constant_detail")
             row.operator("sculpt.sample_detail_size", text="", icon='EYEDROPPER')
+        elif (sculpt.detail_type_method == 'BRUSH'):
+            sub.prop(sculpt, "detail_percent")
         else:
             sub.prop(sculpt, "detail_size")
         sub.prop(sculpt, "detail_refine_method", text="")