[Issue 22] Fix bottom sheet height for navigation and table controllers

[mpospese]

Introduction

When displaying a navigation controller or a table view controller in the bottom sheet, the sheet doesn't size itself correctly.

Purpose

Fix #22

Scope

• Move sheet size constraint properties from appearance to layout
• Expand these constraint properties to include minimum, ideal, and maximum content sizes
• Add mechanism for different views and view controllers to report their ideal size
• Separate the view that has masked corners (must be clipped) from the view that has the sheet's shadow (clipping removes any shadow so cannot be the same view as the one clipping the corners)

Out of Scope

Call out any known issues that are purposely not addressed in this pull request.

📱 Screenshots

Test Case	Before	After
Navigation
Table with 4 items (note missing corner curve)
Navigation + Table with 4 items

📈 Coverage

Code

100%

Documentation

100%