Fix: Cancel link click if triggered as part of text selection

Prevent a click if the user select content in a topic and release the mouse over a link.

https://meta.discourse.org/t/selecting-a-link-results-in-it-being-opened/14846
show parent and child category in oneboxes
FIX: double-escaped single quotes in URLs
FIX: missing avatar when sizing down window
FEATURE: advanced category:NAME search operator
FIX: word-wrap missing from search
FIX: link to sub category not working in search
UX: gutter links use link color, no glyphs
UX: change "foo said:" to "foo:" in quotes
adjust track-link alignment in gutter
Merge pull request #2806 from Elberet/fix-escape-single-quotes

FIX: double-escaped single quotes in URLs
Merge pull request #2795 from lidlanca/fix-link-release

Fix: Cancel link click if triggered as part of text selection
fix tests expecting "name said:" to "name:"
Merge pull request #2803 from techAPJ/patch-3

show parent and child category in oneboxes
FIX: Opera Improvements (v12)

Fix issues with Opera 12 and its ability to utilize Discourse Composer window
https://meta.discourse.org/t/support-for-opera/20218
FEATURE: add name and username to search within topic
Remove "must be" from new account copy
FIX: Category creation failed when translation was missing
removed typo in invitation email template
FIX: BBCode blocks parser no longer mangles JsonML arrays