fix: Emit files:node:updated event on UI_Save

Handle UI_Save post message to update file info and emit
files:node:updated event, allowing other components like the versions
sidebar to react to document saves.

Signed-off-by: silver <s.szmajduch@posteo.de>

Author: silverkszlo

src/view/Office.vue

@@ -503,6 +503,9 @@ export default {
 					FilesAppIntegration.updateFileInfo(undefined, Date.now())
 				}
 				break
+			case 'UI_Save':
+				FilesAppIntegration.updateFileInfo(undefined, Date.now())
+				break
 			case 'Clicked_Button':
 				this.buttonClicked(args)
 				break