Unit tests that show Tree control maintains checked/collapsed state

[StanleyGoldman]

• Adding tests to prove that the load function
  • Loads with collapsed nodes as expected
  • Loads with selected nodes as expected

[StanleyGoldman]

So after my first foray into this, I'm able to reproduce the bug, I see that the load functionality works as expected. I suspect there is a serialization issue, but everything is the same as checked state.

[shana]

There's a bug somewhere, but it's really hard to track down. I got it a couple of times, but it's not consistently reproducible.

[StanleyGoldman]

Cool, i changed the labels on the bug.

[StanleyGoldman]

@shana I think after #698 this bug is resolved. See if you can reproduce it.

[StanleyGoldman]

I updated the body of this this pull request.
It does not solve #594 as I've learned that the problem is due to deserialization issues.

[StanleyGoldman]

i'm pretty sure it happens every other domain reload

[StanleyGoldman]

but data that is created after the first domain reload, is persisted after the second domain reload

[StanleyGoldman]

touching the file system twice and focusing unity once, which is one domain reload, as i understand it, also reproduces the issue