empty menus styled as disabled

client/components/dropdown/dropdown.jsx

@@ -56,6 +56,7 @@ const Dropdown = ({ groupName, className = null, icon, children, color = null, i
 				icon={icon}
 				aria-haspopup='menu'
 				role='menuitem'
+				disabled={children.length > 0 ? false : true}
 			>
 				{trigger(groupName)}
 			</button>

client/homebrew/editor/snippetbar/snippetbar.less

@@ -220,6 +220,11 @@
 		&:hover {
 			background-color : #999999;
 		}
+		&:disabled {
+			color: gray;
+			cursor: not-allowed;
+			&:hover { background-color: unset; }
+		}
 	}
 	.disabledSnippets {
 		color: grey;