make utility buttons also useable for links

src/ui/web/css/themes/element/theme.css

@@ -134,11 +134,11 @@ a.button-action {
     border-radius: 100%;
 }
 
-button.utility.grid {
+.button-utility.grid {
     background-image: url('icons/enable-grid.svg');
 }
 
-button.utility.grid.on {
+.button-utility.grid.on {
     background-image: url('icons/disable-grid.svg');
 }
 

src/ui/web/session/leftpanel/LeftPanelView.js

@@ -68,7 +68,7 @@ export class LeftPanelView extends TemplateView {
             t.button({
                 onClick: () => vm.toggleGrid(),
                 className: {
-                    utility: true,
+                    "button-utility": true,
                     grid: true,
                     on: vm => vm.gridEnabled
                 },