Added shutdown and restart buttons to system UI

New: Shutdown and restart from UI
Fixed: ctrl+c will shutdown app on mono

src/UI/Content/icons.less

@@ -167,3 +167,12 @@
   .icon(@cloud-download);
   color: @errorText;
 }
+
+.icon-nd-shutdown:before {
+  .icon(@off);
+  color: @errorText;
+}
+
+.icon-nd-restart:before {
+  .icon(@repeat);
+}

src/UI/Content/theme.less

@@ -218,4 +218,27 @@ body {
   width: 100%;
   height: 55px;
   opacity: 0;
+}
+
+.lifecycle-controls {
+  font-size: 20px;
+
+  i {
+    cursor: pointer;
+  }
+
+  .drone-button {
+    height: .8em;
+    margin-left: -8px;
+
+    &:hover {
+      .icon-stack-base:before {
+        .icon(@sign-blank)
+      }
+
+      .icon-nd-restart:before {
+        color: white;
+      }
+    }
+  }
 }