fix: #30 - #33

Thanks @idseefeld - I really need to schedule in a v6.0.1 patch release for this.

I need to review a couple of the other changes in PR #31 that @darylteo provided, (again, I'd left this open for far too long!)

I took my solution from the umbraco forums. This fix seems much cleaner lol, if it passes the tests, I say dump mine and go for this one.

Edit: oh mine also has the javascript changes to work with MVC 4.0.0.1 (possibly). I seem to have been the only one with that issue though.

This solution worked perfectly for me and resolved the issue in 6.2.5. Thanks, hopefully it will make it into an updated version on Nuget soon as I still have quite a few sites running on 6.2.5 that sooner or later will run into this.

Thanks to @ProNotion's comment, this came back on my radar. (I'd been more focused on my other - newer - Umbraco packages)

@idseefeld I've manually merged in your commit (a66c2e9), (as our branching structure had gone awry). Thanks also to @darylteo for PR #31!

The fix is part of the v6.1.0 release.