Doc: Web agent -Match doc sections to UI pages for properties

Here's a breakdown of the task to complete for Web Agent.

1. Create an individual file for each property description, removing content from the doc and placing it in each file
2. Include property files in the doc by reference.
3. Create a table of properties referenced by function, and reference it from the Agent Feature overview section. (For properties that manage x feature, see . . .)
4. Order properties according to placement in AM UI, removing any subsections.