Updates to Heroku app.json manifest adding Share bridge options and updating several descriptions

[stavlor]

Updates to Heroku app.json manifest in preparation for funnel cake release

[codecov-io]

Current coverage is 84.24%

Merging #898 into dev will increase coverage by +0.02% as of 619ac17

@@              dev    #898   diff @@
=====================================
  Files          61      61       
  Stmts        4196    4196       
  Branches        0       0       
  Methods         0       0       
=====================================
+ Hit          3534    3535     +1
  Partial         0       0       
+ Missed        662     661     -1

Review entire Coverage Diff as of 619ac17

---

Uncovered Suggestions

1. +0.29% via .../js/profileeditor.js#323...334
2. +0.26% via .../js/profileeditor.js#268...278
3. +0.24% via lib/hashauth.js#27...36
4. See 7 more...

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