browse page: move changeset's when+who info into heading, matching the others
browse page: fix misaligned "Comment" heading
browse page: historylink inside versioninchangeset (not working for history pages yet)
browse page: history link in version text
browse page: "View history" title for version link
Merge remote-tracking branch 'danstowell/browsepage' into next

Conflicts:
	config/locales/be-Tarask.yml
	config/locales/ko.yml
	config/locales/sv.yml