Cannot select Source plan from drop down list in Artifact Download task

Summary

Inside the Artifact download task, when the list of Source plans is long, only a few plans are listed (currently 10), so the user has to enter a few letters in order to filter (auto-fill) the list further. However it's not possible to select an option from the drop-down select list using the mouse, only by using the keyboard.

Environment

1. This issue is observed in the following web browsers: Google Chrome, Internet Explorer and Safari.
2. The issue does NOT seem to happen in Mozilla Firefox.
3. It is reproduced across multiple operating systems.

Steps to Reproduce

1. Create/access the Artifact download task inside a plan.
2. Start typing to fill in the Source plan field and search for a plan.
3. The drop-down list will appear with the search results.
4. Click/select one of the plans using the mouse.

Expected Results

The plan is selected.

Actual Results

Nothing happens. It is as if you did NOT click the plan.

Workaround

It is necessary to use the keyboard to navigate in the drop-down list and select the plan.