Delete Dial from Group

[SkylerBurger]

Summary

This PR addresses Issue #23 which requests the ability to delete a Dial from a Dial Group.

Changes

• Creates a DeleteDial component that is added to each DialDetails list item.
• Updated shiftDial function to allow it to delete a dial if null is provided as the new target index.
• Added simple styling to position the trash icon and ensure that every Confirm stretches to darken the entire screen.