Repair sidebar's close button action

Author: KMDaily

Source/Chatbook/ChatModes/UI.wl

@@ -321,9 +321,8 @@ sidebarHideButton[ Dynamic[ nbo_ ] ] := Button[
         tr @ "SidebarToolbarButtonTooltipHideSidebar"
     ],
     CurrentValue[ $FrontEndSession, "ShowNotebookAssistant" ] = False;
-    FrontEndToken[nbo, "HideSidebar"],
-    Appearance -> "Suppressed",
-    Evaluator  -> None
+    FrontEndTokenExecute[nbo, "HideSidebar"],
+    Appearance -> "Suppressed"
 ]
 
 sidebarHideButton // endDefinition;