Improve copy/pasting of GLQL tables

Currently when you copy a GLQL table, it does not copy as markdown. Pasting in plain text editor does not work at all and in rich text, it sometimes works, and sometimes doesn't. Additionally, all links, labels etc, are not pasted as references, but as actual links.

Proposal

Allow copying a GLQL table as a markdown table. In the copied table:

• All GitLab references like issues, labels, epics, etc should be real references.
• All time references should be absolute, and not relative.