Update tooltip copy with @ryanfeeley's suggestions.

fixes #3607
Use the ndash between 8 and 80: 8&ndash;80
use the &ndash in the initial email sent tooltip
replace ' with &rsquo;, a curly quote
Merge pull request #3608 from shane-tomlinson/issue_3607_tooltip_copy

Update tooltip copy with @ryanfeeley's suggestions.

@ryanfeeley digs the updates. Merging.