Weight on issue board card should not be clickable

When viewing an issue board, issue cards can display the 'Weight' of the issue.

These 'Weight' elements are currently 'clickable' — they have hover styles and have a 'click' event listener attached.

However, the handler for this event listener does not appear to be correct and clicking the element results in an error being logged to the JavaScript console.

Feedback from @nickbrandt:

Weight shouldn't actually be a link, as we have nothing to link to for that. It should behave similar to where it is shown in listing like the Hierarchy/Child widget, where it just has a tooltip. Clicking on it from the Board would function similar to clicking any other non-link, where you are essentially just clicking on the card and it toggles the drawer.

The 'Weight' element as of creating this issue: