always propagate size diff on trash restore

[butonic]

fixes the etag propagation for trash items
part of opencloud-eu/opencloud#281

❯ make test-acceptance-api \
   TEST_SERVER_URL=https://opencloud-server:9200 \
   BEHAT_FEATURE=tests/acceptance/features/coreApiWebdavEtagPropagation2/restoreFromTrash.feature
[...]
The following tests were skipped because they are tagged @skip:
runsh: Total 8 scenarios (8 passed, 0 failed)
runsh: There were no unexpected failures.
runsh: There were no unexpected success.

and make test passes.

@aduffeck returning the recycleNode smells. but the propagation will call Parent() on it anyway. however ... I'm not 100% sure the parint will always be the target destination parent and not the old trash parent. I'll try if I can add that to the tests ... affter lunch