Navigation menu in Preferences (#2304)

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

@@ -4,7 +4,7 @@
 
   background-color: var(--blue);
   padding: 0 2px;
-  height: 22px;
+  height: var(--bottom-bar-height);
 
   #current-workspace {
     font-size: var(--font-size-small);

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

@@ -1,4 +1,6 @@
 .ClusterManager {
+  --bottom-bar-height: 22px;
+
   display: grid;
   grid-template-areas: "menu main" "menu main" "bottom-bar bottom-bar";
   grid-template-rows: auto 1fr min-content;