change layout of dc summary and nodeview

change layout of dc summary and nodeview

this patch changes a few things:
 * instead of having the nodeview in full size, it is just a panel in
   the summary, similar to node/qemu/lxc summary
 * creates the store in the summary component, and not in the nodeview,
   because we need it later
 * makes most of the config options of the nodeview declarative, gets
   rid of the initcomponent
 * changes the 'online' yes/no to a check/x
 * makes the panel resizable with tools

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>