Bitbucket: adding aui-dropdown2-trigger class to command palette dropdown causes exceptions

Created by: lguychard

Steps to reproduce:

1. Visit a bitbucket instance with either the browser extension or the native integration installed.
2. Witness an error in the console:

3. Hover over the command palette dropdown
4. Visit another error in the console:

Expected behavior:

No errors in the console, command palette dropdown doesn't interact with Atlassian's JS.