Fixing interactive resizing bug 

An update of HAML from 728827496eef261f12a35e296cdc0e243c77154d translates underscores in data attributes into hyphens, so this script needs to account for that. Should provide a full-screen control again for [#48924359] among other things.

https://www.pivotaltracker.com/story/show/48924359
Don't show edit links to users who can't follow

For [#51592849] authors editing a sequence shouldn't see edit links for activities they don't have permissions to edit. (The links wouldn't work anyway.)

https://www.pivotaltracker.com/story/show/51592849
Fix spec for new activity show [#51593351]

https://www.pivotaltracker.com/story/show/51593351
Fixing appearance of delete link in sequence edit

[#51592849]

https://www.pivotaltracker.com/story/show/51592849
Adds root link into breadcrumbs for authoring
Links from home to activities and sequence indexes