In https://github.com/zed-industries/zed/pull/2790 I added an extra drag
event on mouse_up which signaled the end of a drag event, as mouse_up
event themselves wouldn't reliably fire if users moved their mouse too
quickly. This broke the assumptions of the terminal element. This PR
adds filters to all current on_drag handlers which removes this new
event.

Release Notes:

- Fixed a bug causing terminal links to never open (preview only)
- Fixed a bug in terminal link detection causing it to miss files with a
`-` in it