Improvements and corrections to titles, descriptions etc. Non functional house cleaning.

## What are the schemas that are affected by the issue
Many, but no changes will functionally change any schemas.

## What are examples of products that are impacted by the issue
N/A

Various textual errors and incorrectness have been building up over the last few releases. This issues and the associated PR will improve and correct the titles, descriptions and simular non functional aspects of the schemas.

The issue names no files, tests, or entry points and says that many schemas are affected. Start by identifying the schema titles and descriptions containing the reported textual errors; done means correcting the non-functional wording without changing schema behavior.

Written by the indexing model from the issue text.