admin-ui: Hide 1st column in user's modals

Exception: The contact modal
Fix apyrgio/synnefo#135
admin-ui: More button clean-up

Table selection buttons are not visible when they are disabled
admin-ui: Change main link color
admin-ui: Fix JS bug
admin: Show main item in each association
admin: Send JSON response when action finishes

Wait for action(s) to finish and then return the result of the operation
along with the ids for which there was an error.

The returned JSON has the following structure:

{
    error_ids = [id1, id2, id3],
    result = "Message to display"
}

Last, the following HTTP status codes can be returned:

* 200: All actions have completed successfully. All other status codes
  mean that the actions have failed partially or completely.

* 400: Bad request.
* 403: Not permitted.
* 404: Unknown operation.
* 405: Method (GET) not allowed
* 500: Server error. If this status code is returned, this means that
  there is no accompanying JSON to use.
* 501: Not implemented.
admin: Fix detached IP issue

Check if the IP is in use before fetching the VM and network that is
attached in.
admin-ui: Change expand arrow hover state style
admin-ui: Change modals style

Fix apyrgio/synnefo#127
admin-ui: Add title to <a> removing items from selection