Popovers not working as expected in Grid reset options section of settings

Using the Boost theme, the popover help text in the Grid reset options sections isn't working as expected.

To reproduce the issue:

1. Ensure that the Boost theme has been selected
2. Navigate to a course settings page and enable the Grid format
3. Expand the Grid reset options section
4. Click on one of the query icons that pops up help text

Expected behaviour would be:

• Clicking once opens the help text bubble
• Clicking again closes the help text
• Both actions are independent of selecting the checkbox for the option

But what actually happens is:

• Clicking opens the help text bubble
• But the bubble only remains visible as long as the mouse button remains pressed
• Releasing the button makes the help text disappear
• Clicking the query icon also toggles the state of the checkbox