Happy Hits UK

Various Bug fixes:
- Pause button now shows when listening live
- Show does not abruptly restart on listen again when selecting it from the menu as it is playing
- A readable link and warning added to the radio competition Win tab, taking on-air interaction out of the app
New Features:
- Tweak: A "Now Playing" button has been added when an on-demand show is playing during navigation screens
- Tweak: Shows that are not ready for playback will now be greyed out
- Tweak: The start time of a programme is now displayed in the listen again area
- New: Happy Hits Radio XMAS is now available in the app during the festive period