Share and autosuggest followup

Follow-up on review from #2888.

- Showing error notifications when user is not allowed to share
- Fixed tab keyboard trap in jquery.autoSuggest plugin. Also submitted PR to jquery.autoSuggest (https://github.com/wuyuntao/jquery-autosuggest/pull/30)
- Fixed i18n error logging bug for untranslated keys
- Hide action clips on content and discussion profile page