TT-7335 Improve aesthetics of racetrack UI (#314)

- Draw parallelogram with clipPath instead of skewX, and make them bigger
- Match workflow step label typography to Record screen
- Adjust padding for cleaner view
- Add mock passage dropdown
- Center workflow steps relative to full row width
- Code cleanup
- Add some comments
- Hook up passage dropdown with real section passages
- Block passage dropdown from opening during recording or while remote is busy
- Filter out publishing titles from passage dropdown
- Swap dropdown/racetrack nav roles based on workflow progression mode
- Show step tip button left of dropdown in passage progression mode
- Update MobileWorkflowSteps Cypress test for step/passage progression modes

Author: nghtctrl