Merge pull request #156 from rpbouman/BISERVER-8154

Biserver 8154
Merge pull request #157 from rpbouman/BISERVER-8154

BISERVER-8154 - Disable the edit button after deleting a connection.
BISERVER-6406 - IE: Dialog buttons show highlight/hover state when opened a second time.
Merge pull request #158 from jeffreythomas/dev

BISERVER-6406 - IE: Dialog buttons show highlight/hover state when opene...
BISERVER-8154: initalize datasource model if necessary.