Revert "Parse: Improve Bar."

This reverts commit 9893bca6cb0a68d671233e3367ef6bb5de0495f2.
Revert "Revert "Parse: Improve Bar.""

This reverts commit e35a1132f1204ab487189d9dc60e0df9049a7a79.
Revert some changes.
T.P.R.Docx.Math introduced.

For converting from unicode to tex.
Docx parse: Look up runs with both "w" and "m" prefix

Math runs and word runs act the same, but they have different prefixes.
Docx reader: start converting math.

We start with strings.