Revert "Fixed UF-162: perspective geometry occasionally saves incorrectly"

This change turned out to break some panel nesting behaviours. Apparently
I didn't run the integration tests before pushing it! Oops!

This reverts commit 569e5d4f662d38811e18f1c4d55e0bd044cea471.
Update to Errai 3.0.4.Final
UberFire 0.5.0.CR6 release
Back to 0.5.0-SNAPSHOT