Update MvcDisplayModelConverter.cs

Redoing Pull Request to fix issue #379
Merge pull request #388 from samjudson/patch-2

Update MvcDisplayModelConverter.cs
Update test client to have latest HUD data structure
Fix #391 - Force the width to be 100% by default
Fix #379 - Finial update to make sure action is safe as well as view
Finial message update before 1.4.2 release
Merge remote-tracking branch 'upstream/master'