Test block reshaping, including updates to views

[AnmAtAnm]

Block reshape() constraints:

• Exception when reshape breaks previous/output parent constraints.
• Exception when input child block does not have a point of connection in the resulting state.
• Exception when statement child block does not have a point of connection in the resulting state.
• Exception when next child block does not have a point of connection in the resulting state.

Block reshape() effects:

BlockViewFactory rebuildBlockView() and BlockView UI:

• Input child BlockView that is connected before & after is connected appropriately.
• Statement child BlockView that is connected before & after is connected appropriately.
• BlockView is reparented to BlockGroup at appropriate location.
• Old BlockView, InputViews, FieldViews are no longer referenced (WeakReferences will return null).