Redesign Model Builder Scenario Screen

**Is your feature request related to a problem? Please describe.**

As we've expanded the number of scenarios in Model Builder, the screen has become cluttered and some scenarios require scrolling because the current tile design takes up too much space for each of the tiles.


**Describe the solution you'd like**

Work with design team to come up with a more discoverable scenario screen.

**Describe alternatives you've considered**
N/A

**Additional context**
N/A