[#6482] import page for existing projects
[#6482] change page to show importers in a grid
[#6482] add a test for the importer admin page
[#6482] simpler logic to build matrix of importers (thanks Cory)
[#6526] Clean up individual tool importers

- Make forms look (slightly) better
- Add validation
- Kick off import as task

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
[#6526] Fix typo

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
[#6526] Fix MountPointValidator to provide default value

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
[#6526] Better label on submit button

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>