added keyboard shortcut for toggling the right pane, closes #4552

src/services/keyboard_actions.js

@@ -494,9 +494,16 @@ const DEFAULT_KEYBOARD_ACTIONS = [
         separator: "Other"
     },
 
+    {
+        actionName: "toggleRightPane",
+        defaultShortcuts: [],
+        description: "Toggle the display of the right pane, which includes Table of Contents and Highlights",
+        scope: "window"
+    },
     {
         actionName: "printActiveNote",
         defaultShortcuts: [],
+        description: "Print active note",
         scope: "window"
     },
     {