move tabbed windows collapsed in **clients list, so focusing next/prev will be nicer

client.c

@@ -271,6 +271,27 @@ configure(Client * c)
     XSendEvent(c->display, c->win, False, StructureNotifyMask, (XEvent *) & ce);
 }
 
+/** Attach client after another one
+* \param client to attach to
+* \param c the client
+*/
+void
+client_reattach_after(Client *head, Client *c)
+{
+    if(head->next == c)
+        return;
+
+    if(head->next)
+        head->next->prev = c;
+
+    if(c->prev)
+        c->prev->next = c->next;
+
+    c->next = head->next;
+    head->next = c;
+    c->prev = head;
+}
+
 /** Attach client to the beginning of the clients stack
  * \param head client list
  * \param c the client

client.h

@@ -31,6 +31,7 @@ Client * get_client_bywin(Client **, Window);
 void grabbuttons(Client *, Bool, Bool, KeySym, unsigned int);
 inline void client_attach(Client **, Client *);
 inline void client_detach(Client **, Client *);
+void client_reattach_after(Client *, Client *);
 void ban(Client *);             /* bans c */
 void configure(Client *);       /* send synthetic configure event */
 void focus(Client *, Bool, awesome_config *);

tab.c

@@ -89,6 +89,7 @@ uicb_tab(awesome_config *awesomeconf,
         c->tab.prev = tmp;
 
         c->tab.isvisible = False;
+        client_reattach_after(sel, c);
         arrange(awesomeconf);
         focus(sel, True, awesomeconf);
     }