Add option to open external links in a ifrem on issue view
On /issue/{issue_id}
view we have a lot of useful information about bug history but this is not everything - you have to read the comments on the bugs associated with the issue.
Currently this requires us opening the links to them in separate tabs.
If one is looking at multiple bugs and has multiple pairs of tabs opened it's easy to lose track of what bug belongs to which cibuglog's issue.
Adding an option to display the bug filing (e.g. bugzilla's bug) in an iframe on cibuglog's issue view would be nice - everything would be contained in a single tab.