hgview #87220 add support for hg qv --mq [rejected]

The hg qv --mq command would launch hgview on the $root/.hg/patches repository (same thing as hg ci --mq, hg out --mq, hg pull --mq etc.)

prioritynormal
typeenhancement
done in<not specified>
load0.000
load left0.000
closed by<not specified>