Rebuild Part Types control

[replaysMike]

Currently the management of part types is difficult as there are so many now. We need a better page layout for part types management, as well as a custom dropdown control (searchable) to replace the existing dropdown.

This will likely be done for the next release.

[pdo59]

It would also be useful to have the possibility to search for parts by part type

[replaysMike]

Agreed - I'm going to add this to the search page as I'm surprised I didn't already add it, probably got overlooked.