Upgrade to latest ember

[jmar910]

There are a few outstanding PRs that can be cleaned up and also ones that work can be lifted from (#187). It might be best to use the work from #187 to get us to ember 3.5, or we can attempt to get to 3.4.2 and then upgrade to 3.5.

I did some research into the failing tests on #187 in ember LTS 2.16 and it seems like it would be beneficial to do #191 and #193 first, rewrite those 2 failing tests to use closure actions and remove usage of target(as opposed to using target and bubbling actions), then do the ember upgrade.