UI Improvements and support for double pick weeks

We made an update today which included several small UI improvements to the picks and functionality for double pick weeks.

Added the ability to go back to your entries after making picks and fixed a bug when you used the back button it would clear out your picks.
Added the functionality for double pick weeks. Allows the user to choose two teams in one week and then disables all other options for the week.
Added "View All Picks" button as an easy way to see a compact list of all your picks for the season.