re-add ability to link issues in bulk

We used to have the ability via the Old View to copy a list of issue keys and paste them into the Link issues field so we could easily link a mass of issues at once. We no longer seem to have that ability and would like it re-added in the current Link Issues options available in the new issue view, as this is incredibly useful in our QA checking and as a back up option if issues are raised outside of a Capture for Jira test session, or that tool is unusable. Currently we need to paste or search for each issue individually to add each link to the task or issue we want, which is much more time consuming.