this patch adds a custom progressbar widget which changes color, depending on the value, and adds cpu/memory usage and uptime as columns to the nodeview altough those columns are missing in the model/api call, this works , because we inject the data in our data collectin loop and having the fields not in the model, causes the store not to overwrite them Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>