#799: group by window class before grouping by pid, allows xterms to …

…be grouped together despite being different processes

git-svn-id: https://xpra.org/svn/Xpra/trunk@8626 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/client/gtk2/client.py

@@ -366,14 +366,14 @@ def get_group_leader(self, metadata, override_redirect):
             return group_leader_window
         reftype = "xid"
         ref = leader_xid
-        if ref<0:
-            reftype = "pid"
-            ref = pid
         if ref<0:
             ci = metadata.strlistget("class-instance")
             if ci:
                 reftype = "class"
                 ref = "|".join(ci)
+            elif pid>0:
+                reftype = "pid"
+                ref = pid
             else:
                 #no reference to use! invent a unique one for this window:
                 #(use its wid)