Preview Premade Sheets

• Adds ability to preview premade sheets at a table.
• Adds assets labels at a table. You will be able to see when an asset is shared publicly or comes from a quick-start adventure.
• Updates position of map buttons to the top right of the screen.
• Updates sheets/templates throughout app to use the same avatar design.
• Fixes video/audio button focus at a table.

This update also has some background work in preparation for some future features coming down the roadmap. More info on that coming soon!