Revert "Revert "Skin alter push""

[kchadha]

Reverts #493

This PR needs investigation as to whether this original PR (e.g. #470) or #467 was failing gui integration tests.

Fix (if necessary) and re-make this PR.

cc/ @cwillisf @mzgoddard

[cwillisf]

In its current form, this breaks the costume size indicators in the costume tab:

Modifying the costume causes the size indicator to update to an apparently-correct value so it looks like it might be an initialization or order-of-operations issue.

[adroitwhiz]

@cwillisf The costume size indicators are fixed in #497

[cwillisf]

Tested locally, these fixes seem to do the trick.
Thanks, @mzgoddard and @adroitwhiz!