hgview #84465 add a link to browse the ticket related to a changeset [validation pending]

Most description has something like ``(closes #1234)``. ``#1234`` may be a link to the ticket on the forge.

prioritynormal
typeenhancement
done in1.5.0
load0.250
load left0.000
closed by#104e38611e6b [qt] replace text in description for fancy display (closes #84465)