Add "emulate push event" button to ServiceWorkersView in DevTools [2/2 blink]

Source/devtools/front_end/resources/serviceWorkersView.css

Index: Source/devtools/front_end/resources/serviceWorkersView.css
diff --git a/Source/devtools/front_end/resources/serviceWorkersView.css b/Source/devtools/front_end/resources/serviceWorkersView.css
index 628f43f2ee7588d15deabfc3dbc3b598ee36c98e..06de168259718f4b838d9cff316b48fd6e3d8679 100644
--- a/Source/devtools/front_end/resources/serviceWorkersView.css
+++ b/Source/devtools/front_end/resources/serviceWorkersView.css
@@ -162,21 +162,6 @@
     text-overflow: ellipsis;
 }
 
-.service-workers-start-button {
-    -webkit-mask-position: -64px -48px;
-}
-
-.service-workers-stop-button {
-    -webkit-mask-position: -96px -48px;
-}
-
-.service-workers-delete-button {
-    -webkit-mask-position: -128px -24px;
-    position: absolute;
-    top: 50%;
-    transform: translate(0, -50%);
-}
-
 .service-workers-button {
     -webkit-mask-image: url(Images/statusbarButtonGlyphs.png);
     -webkit-mask-size: 320px 144px;
@@ -202,6 +187,29 @@
     opacity: 0.8;
 }
 
+.service-workers-button:disabled {
+    opacity: 0.5;
+}
+
+.service-workers-start-button {
+    -webkit-mask-position: -64px -48px;
+}
+
+.service-workers-stop-button {
+    -webkit-mask-position: -96px -48px;
+}
+
+.service-workers-delete-button {
+    -webkit-mask-position: -128px -24px;
+}
+
+.service-workers-push-button {
+    -webkit-mask-image: url(Images/notifications.svg);
+    -webkit-mask-position: 7px 3px;
+    -webkit-mask-repeat: no-repeat;
+    -webkit-mask-size: 18px 18px;
+}
+
 .service-workers-error {
     display: flex;
 }