[BUGFIX] Allow any doktype for linking beside sysfolder and recycler

Since TYPO3 version 10.4, the custom page type is not restricted
to any range of numbers.
This limitation no longer exists, and any number is allowed.

The ElementBrowserPageTreeView just now also respect this and
allows to link to other any doktype beside:
- PageRepository::DOKTYPE_RECYCLER
- PageRepository::DOKTYPE_SYSFOLDER

Resolves: #97626
Releases: main, 11.5, 10.4
Change-Id: Iffc3f705f74cc7516464fdb00adb456141657948
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75133


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>

typo3/sysext/backend/Classes/Tree/View/ElementBrowserPageTreeView.php

@@ -159,7 +159,12 @@ class ElementBrowserPageTreeView extends BrowseTreeView
      */
     public function ext_isLinkable($doktype, $uid)
     {
-        return $uid && $doktype < PageRepository::DOKTYPE_SPACER;
+        $notLinkableDokTypes = [
+            PageRepository::DOKTYPE_SPACER,
+            PageRepository::DOKTYPE_SYSFOLDER,
+            PageRepository::DOKTYPE_RECYCLER,
+        ];
+        return $uid && !in_array($doktype, $notLinkableDokTypes, true);
     }
 
     /**