Sculpt: use ESC key in addition to RMB to cancel eyedropper

This is more in line to other eyedropper usages throughout blender.

Affected operators:
- Sample Dyntopo detail
- Extract Face Set (as reported in T82615)

ref T82615

Maniphest Tasks: T82615

Differential Revision: https://developer.blender.org/D9531

source/blender/editors/mesh/editmesh_mask_extract.c

@@ -408,7 +408,7 @@ static int face_set_extract_modal(bContext *C, wmOperator *op, const wmEvent *ev
         return geometry_extract_apply(C, op, geometry_extract_tag_face_set, &params);
       }
       break;
-
+    case EVT_ESCKEY:
     case RIGHTMOUSE: {
       WM_cursor_modal_restore(CTX_wm_window(C));
       ED_workspace_status_text(C, NULL);

source/blender/editors/sculpt_paint/sculpt_detail.c

@@ -329,7 +329,7 @@ static int sculpt_sample_detail_size_modal(bContext *C, wmOperator *op, const wm
         return OPERATOR_FINISHED;
       }
       break;
-
+    case EVT_ESCKEY:
     case RIGHTMOUSE: {
       WM_cursor_modal_restore(CTX_wm_window(C));
       ED_workspace_status_text(C, NULL);