TemplateSaveAs is broken by design, let's disable it.

Change-Id: I67a4c6aed1c66a8350f2b938fff7bcf1dfd84768
Reviewed-on: https://gerrit.libreoffice.org/84740
Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>

wsd/LOOLWSD.cpp

@@ -3074,7 +3074,9 @@ class ClientRequestDispatcher : public SocketHandlerInterface
         capabilities->set("convert-to", convert_to);
 
         // Supports the TemplateSaveAs in CheckFileInfo?
-        capabilities->set("hasTemplateSaveAs", true);
+        // TemplateSaveAs is broken by design, disable it everywhere (and
+        // remove at some stage too)
+        capabilities->set("hasTemplateSaveAs", false);
 
         // Supports the TemplateSource in CheckFileInfo?
         capabilities->set("hasTemplateSource", true);