[VMS] Modify `FocusVisibleOnly` to use `pointer` cursor

[PC98]

• We added an on-click function to event cards in #252, however, when a user hovers their mouse over the cards, the mouse doesn't change to a cursor to indicate that the card is clickable.
• Make relevant changes to FocusVisibleOnly to correct this behavior. After this, you should be able to remove the cursor: "pointer" style in EventsPageFilterContainer since that also uses FocusVisibleOnly.
• Make sure to test any UI that might be affected by this change.

[mbrown379]