[enhance] UI:Add Template button should be "disable" but not "hide" before input the iSO

[zhoumeina]

1 add template page
2 "select the ISO you'd like to use to create a template" textfield ,put the iso path and then click in the outside of the textfield.
3 the "Create" button shows.

I think this is not a good User-Centered design.

[adamkingit]

I would consider this a defect. The button should be disabled until some input is provided in the field. The button should then be enabled.

[alinefm]

Fixed by 130d98b