Fix: closing workspace menu after clicking on iframe (#2349)

src/renderer/components/cluster-manager/cluster-manager.scss

@@ -11,10 +11,6 @@
     grid-area: main;
     position: relative;
     display: flex;
-
-    > * {
-      z-index: 1;
-    }
   }
 
   .ClustersMenu {
@@ -33,6 +29,7 @@
     bottom: 0;
     display: flex;
     background-color: $mainBackground;
+    z-index: 1;
 
     iframe {
       flex: 1;

src/renderer/components/cluster-manager/clusters-menu.scss

@@ -61,3 +61,7 @@
     }
   }
 }
+
+.Menu.WorkspaceMenu {
+  z-index: 2; // Place behind Preferences, Extension pages etc...
+}