using maximizable="true" minimizable="true", a panel will have a minimize button and a maximize button.

when maximizing a panel, the "maximize" button (arrows out) change into a restore size button (arrows in).
Currently the tooltips for the restore action is "minimize". which is the same tooltip as the "minimize" button (hide the panel).

   <window height="97%" width="97%" border="normal" mode="overlapped" position="center"> 
     <panel width="250px" height="100px" framable="true" border="normal" maximizable="true" minimizable="true" title="Title">
        <panelchildren/>
     </panel> 
   </window>