Internal issue 3244 - IcPopoverMenu automatically exits on mouse up outside of display

Reproduction steps:
- Enter an IcPopoverMenu
- Click inside the modal
- Release click outside of the modal
- Observe that the modal closes

This can be unexpected for a user e.g. when a user tries to highlight text and releases the mouse outside of the modal, the modal disappears.

**Expected behaviour:**
Releasing click outside the modal should neither close the modal nor activate the menu item clicked

Please include a Cypress test to ensure the fix functions as expected

Start by locating the IcPopoverMenu implementation and identify where its Cypress tests belong. Reproduce the mouse-up sequence, then verify that releasing outside leaves the modal open and does not activate a menu item, with a Cypress test covering the expected behavior.

Written by the indexing model from the issue text.