Revert "Another even dumber user vs. dom Element error."

This reverts commit 3aeb2086859433176fc28648cd12b8580e05dd2f.
Revert "Another user.client.Element fix."

This reverts commit 315e5099f3cd0ad7214740047d1a0b25d431785f.
Revert "Need a new cache version with Element change."

This reverts commit 72d5029d0ac6705e0c61060ec96a8025ff33379e.
Revert "Use user.client.Element in the GwtViews."

This reverts commit a77610f700e4c9f01dd982502564ea7b37db0d7b.
Revert "Change IsElement to return user.client.ELement."

This reverts commit 06e37af45b7945062dade2e53edc7a77959c1f7b.
Looks like casting was the right thing to do.