Update top-right settings icon to look behave consistently with cluster actions

Signed-off-by: Alex Culliere <alozhkin@mirantis.com>

src/renderer/components/layout/main-layout-header.tsx

@@ -1,8 +1,13 @@
 import { observer } from "mobx-react";
 import React from "react";
+import { remote } from "electron";
 
 import { clusterSettingsURL } from "../+cluster-settings";
-import { broadcastMessage } from "../../../common/ipc";
+import { landingURL } from "../+landing-page";
+import { ConfirmDialog } from "../confirm-dialog";
+import { clusterStore } from "../../../common/cluster-store";
+import { clusterDisconnectHandler } from "../../../common/cluster-ipc";
+import { broadcastMessage, requestMain } from "../../../common/ipc";
 import { Cluster } from "../../../main/cluster";
 import { cssNames } from "../../utils";
 import { Icon } from "../icon";
@@ -13,20 +18,69 @@ interface Props {
 }
 
 export const MainLayoutHeader = observer(({ cluster, className }: Props) => {
+  const showContextMenu = () => {
+    const { Menu, MenuItem } = remote;
+    const menu = new Menu();
+
+    menu.append(new MenuItem({
+      label: "Settings",
+      click: () => {
+        broadcastMessage("renderer:navigate", clusterSettingsURL({
+          params: {
+            clusterId: cluster.id
+          }
+        }));
+      }
+    }));
+
+    if (cluster.online) {
+      menu.append(new MenuItem({
+        label: "Disconnect",
+        click: async () => {
+          if (clusterStore.isActive(cluster.id)) {
+            broadcastMessage("renderer:navigate", landingURL());
+            clusterStore.setActive(null);
+          }
+          await requestMain(clusterDisconnectHandler, cluster.id);
+        }
+      }));
+
+      if (!cluster.isManaged) {
+        menu.append(new MenuItem({
+          label: "Remove",
+          click: () => {
+            ConfirmDialog.open({
+              okButtonProps: {
+                primary: false,
+                accent: true,
+                label: "Remove"
+              },
+              ok: () => {
+                if (clusterStore.activeClusterId === cluster.id) {
+                  broadcastMessage("renderer:navigate", landingURL());
+                  clusterStore.setActive(null);
+                }
+                clusterStore.removeById(cluster.id);
+              },
+              message: <p>Are you sure want to remove cluster <b title={cluster.id}>{cluster.contextName}</b>?</p>,
+            });
+          }
+        }));
+      }
+    }
+    menu.popup({
+      window: remote.getCurrentWindow()
+    });
+  };
+
   return (
     <header className={cssNames("flex gaps align-center justify-space-between", className)}>
       <span className="cluster">{cluster.name}</span>
       <Icon
-        material="settings"
-        tooltip="Open cluster settings"
+        material="more_vert"
+        tooltip="Cluster actions"
         interactive
-        onClick={() => {
-          broadcastMessage("renderer:navigate", clusterSettingsURL({
-            params: {
-              clusterId: cluster.id
-            }
-          }));
-        }}
+        onClick={showContextMenu}
       />
     </header>
   );