Add unit test for window of size 0x0

[PoignardAzur]

Masonry's widgets should be able to handle cases where the available space is null and proceed without crashing.

To check that this happens, we should create a test case with a large widget tree (ideally all of the built-in widgets) and check that the tree can be created with a size of zero without crashing.

[PoignardAzur]

Well... that's new.

Anyone know how to block an account from an organization?

[xStrom]

Resolved in #1232