docs(feature): new C2 shortcuts

YoYoGames/GameMaker-Bugs#5292

Manual/contents/The_Asset_Editors/Code_Editor_Properties/Editing_Text.htm

@@ -52,6 +52,8 @@ <h3>Navigation Between Documents</h3>
     <li><span class="shortcut"><strong>ALT/OPT + SHIFT + M</strong></span>: Fold all documents. Useful for navigating between events if you have a lot of them.</li>
     <li><span class="shortcut"><strong>ALT/OPT + SHIFT + U</strong></span>: Unfold all documents.</li>
     <li><span class="shortcut"><strong>ALT/OPT + M</strong></span>: Fold the currently active document (the one where your text cursor is present).</li>
+    <li><span class="shortcut">CTRL/CMD + HOME/END</span>: Go to the first or last line of the active document.</li>
+    <li><span class="shortcut">CTRL/CMD + ALT/OPT + HOME/END</span>: Go to the first or last line among all the open documents.</li>
   </ul>
   <h2>Writing Code</h2>
   <p>While writing code you will get syntax highlighting and auto-complete for the language you are currently editing.</p>