Fixed machines and containers so that they can only be deleted once.
Use new render inspector method for overview test
Use new render inspector method for inspector settings tests
Merge pull request #500 from huwshimi/single-delete-machines

Fixed machines and containers so that they can only be deleted once

When you click the delete icon on a machine or container in the machine view it should only register the first delete per machine/container.
Merge pull request #501 from hatched/inspector-test-method

Update the inspector tests to use the real inspector class

These inspector tests were using the old environment inspector render method which is no longer used while under mv. This instantiates the inspector directly relying on the same mocks done before.
Only show create container if a parent id is set
Merge pull request #502 from makyo/add-container-active

Only show create container if a parent id is set

The user should not be able to create a new container without a machine selected.