Show shortcut for Show All Commands (fixes #18938)

src/vs/workbench/parts/welcomePage/electron-browser/welcomePage.css

@@ -174,7 +174,7 @@
 	white-space: nowrap;
 }
 
-.monaco-workbench > .part.editor > .content .welcomePage .commands li button span {
+.monaco-workbench > .part.editor > .content .welcomePage .commands li button > span {
 	display: inline-block;
 	width:100%;
 }

src/vs/workbench/parts/welcomePage/electron-browser/welcomePage.html

@@ -37,7 +37,7 @@
 				<li><button data-href="command:workbench.action.welcomeOverlay"><h3>Interface overview</h3> <span>Get a visual overlay highlighting the major components of the UI</span></button></li>
 				<li><button data-href="command:workbench.action.selectTheme"><h3>Color theme</h3> <span>Make the editor and your code look the way you love</span></button></li>
 				<li><button data-href="command:workbench.action.keybindingsReference"><h3>Keyboard shortcuts</h3> <span>A printable PDF with the most common keyboard shortcuts</span></button></li>
-				<li><button data-href="command:workbench.action.showCommands"><h3>Show all commands</h3> <span>Rapidly access and search commands from the control pannel</span></button></li>
+				<li><button data-href="command:workbench.action.showCommands"><h3>Show all commands</h3> <span>Rapidly access and search commands from the control pannel (<span class="shortcut" data-command="workbench.action.showCommands"></span>)</span></button></li>
 				<li><button data-href="command:workbench.action.openGlobalSettings"><h3>Configure settings</h3> <span>Unlock the full power of VS Code by tweeking the settings</span></button></li>
 				<li><button data-href="command:workbench.extensions.action.showRecommendedKeymapExtensions"><h3>Change Default Keyboard Shortcuts</h3> <span>Install an extension to adopt the keyboard shortcuts from another tool</span></button></li>
 				<li><button data-href="command:workbench.action.editorWalkThrough"><h3>Interactive playground</h3> <span>Try essential editor features out in a short walkthrough</span></button></li>