Fix problem with editing types

[cjmyers]

closes #1566

[danielfang97]

I tried to input in a circular type to a part, but I think I did it wrong, and it threw an error. It can no longer access the part at all. I think when an improper type is added, it should throw an error and try to allow you to change it. Not break the part completely.

[danielfang97]

What I'm saying, it should be easier to add/edit a type. People may not know the exact way to do it.

[cjmyers]

The inability to access the part after enter a bad type is exactly the error I was trying to fix here. Could you verify that you tested this on this branch. I thought I had fixed that behavior.

[danielfang97]

Just tested and it appears to no longer throw the error. However, there is a new bug where if you leave the box blank, it remains there. Blank should be treated the same as a wrong type.

[cjmyers]

I think that bug was there before too, I can log a new issue for that

[danielfang97]

So, should I just approve this one? Or are we adding an issue to this PR?

[danielfang97]

Works as expected. Now, it doesn't throw an error