Replace shutdown with shut down a few more places where it was used as a verb.

packages/console-extension/src/index.ts

@@ -509,7 +509,7 @@ async function activateConsole(
     name: 'Console',
     closeAndCleanup: (current: ConsolePanel) => {
       return showDialog({
-        title: 'Shut Down the console?',
+        title: 'Shut down the console?',
         body: `Are you sure you want to close "${current.title.label}"?`,
         buttons: [Dialog.cancelButton(), Dialog.warnButton()]
       }).then(result => {

packages/mainmenu-extension/src/index.ts

@@ -211,7 +211,6 @@ const plugin: JupyterFrontEndPlugin<IMainMenu> = {
         command: CommandIDs.logout,
         category: 'Main Area'
       });
-
     }
 
     palette.addItem({
@@ -511,23 +510,23 @@ export function createKernelMenu(app: JupyterFrontEnd, menu: KernelMenu): void {
   });
 
   commands.addCommand(CommandIDs.shutdownKernel, {
-    label: 'Shutdown Kernel',
+    label: 'Shut Down Kernel',
     isEnabled: Private.delegateEnabled(app, menu.kernelUsers, 'shutdownKernel'),
     execute: Private.delegateExecute(app, menu.kernelUsers, 'shutdownKernel')
   });
 
   commands.addCommand(CommandIDs.shutdownAllKernels, {
-    label: 'Shutdown All Kernels…',
+    label: 'Shut Down All Kernels…',
     isEnabled: () => {
       return app.serviceManager.sessions.running().next() !== undefined;
     },
     execute: () => {
       return showDialog({
-        title: 'Shutdown All?',
+        title: 'Shut Down All?',
         body: 'Shut down all kernels?',
         buttons: [
           Dialog.cancelButton(),
-          Dialog.warnButton({ label: 'SHUTDOWN' })
+          Dialog.warnButton({ label: 'SHUT DOWN ALL' })
         ]
       }).then(result => {
         if (result.button.accept) {

packages/notebook-extension/src/index.ts

@@ -1089,7 +1089,7 @@ function addCommands(
     isEnabled
   });
   commands.addCommand(CommandIDs.closeAndShutdown, {
-    label: 'Close and Shutdown',
+    label: 'Close and Shut Down',
     execute: args => {
       const current = getCurrent(args);
 
@@ -1100,7 +1100,7 @@ function addCommands(
       const fileName = current.title.label;
 
       return showDialog({
-        title: 'Shutdown the notebook?',
+        title: 'Shut down the notebook?',
         body: `Are you sure you want to close "${fileName}"?`,
         buttons: [Dialog.cancelButton(), Dialog.warnButton()]
       }).then(result => {
@@ -1927,7 +1927,7 @@ function populateMenus(
     closeAndCleanup: (current: NotebookPanel) => {
       const fileName = current.title.label;
       return showDialog({
-        title: 'Shutdown the notebook?',
+        title: 'Shut down the notebook?',
         body: `Are you sure you want to close "${fileName}"?`,
         buttons: [Dialog.cancelButton(), Dialog.warnButton()]
       }).then(result => {

packages/running/src/index.tsx

@@ -173,7 +173,7 @@ function Item<M>(props: SessionProps<M> & { model: M }) {
         className={`${SHUTDOWN_BUTTON_CLASS} jp-mod-styled`}
         onClick={() => props.shutdown(model)}
       >
-        SHUTDOWN
+        SHUT DOWN
       </button>
     </li>
   );
@@ -221,7 +221,7 @@ function Section<M>(props: SessionProps<M>) {
       title: `Shut Down All ${props.name} Sessions?`,
       buttons: [
         Dialog.cancelButton(),
-        Dialog.warnButton({ label: 'SHUT DOWN' })
+        Dialog.warnButton({ label: 'SHUT DOWN ALL' })
       ]
     }).then(result => {
       if (result.button.accept) {