Add list indent/outdent controls on mobile (#5205)

shared/editor/nodes/ListItem.ts

@@ -193,6 +193,13 @@ export default class ListItem extends Node {
     ];
   }
 
+  commands({ type }: { type: NodeType }) {
+    return {
+      indentList: () => sinkListItem(type),
+      outdentList: () => liftListItem(type),
+    };
+  }
+
   keys({ type }: { type: NodeType }) {
     return {
       Enter: splitListItem(type),

shared/i18n/locales/en_US/translation.json

@@ -299,6 +299,8 @@
   "Current date": "Current date",
   "Current time": "Current time",
   "Current date and time": "Current date and time",
+  "Indent": "Indent",
+  "Outdent": "Outdent",
   "Could not import file": "Could not import file",
   "Account": "Account",
   "Notifications": "Notifications",