Related to Issue

Fixes #237

Description

Updates the DNN dependencies to match v9.10.00.
Updates the .NET Framework to 4.8.
Improves the UX of the edit view to help end-users know what/how to add content.
Updated build scripts.
Adds a symbols package.

How Has This Been Tested?

Local dev site

Screenshots (if appropriate):

N/A

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.