fixes #1712 email me this app success and error working again
fixes #1712 transition updates and now proper error on share and remix links.
set cors for email remix path
catch errors throw by postmark in the remix and share path too
close on success
Merge branch 't1712' of github.com:ScottDowne/appmaker into develop
Merge pull request #2168 from ScottDowne/t1712

T1712 Fixes to app email success and fail messages
Merge branch 'develop' of github.com:mozilla-appmaker/appmaker into develop