Fix suggestions list overflow (unintentionally introduced when fixing resizing)

[jonathansampson]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

While the overflow: hidden resolved the titlebar issue, it did so at
the cost of clipping suggestions. This approach achieves the desired
results, without clipping.

Fixes #4298

Auditors: @bsclifton, @bbondy

Before:

After:

[bsclifton]

Tested in my branch, LGTM 😄