Add support for all browse mode navigation keys in MS Office products and improve navigation by Tab in forms

[Adriani90]

Steps to reproduce:

1. Run MS Word or MS Outlook with a template for a certain form containing formfields, headings, links, embeded objects etc.
2. Try to fill in the form by navigating in browse mode from edit field to edit field or try to jump between embeded objects
3. Try to navigate through the formfield in MS word by pressing tab.

Expected behavior:
NVDA should let me navigate either in browser mode through certain elements like in a browser or by pressing tab to jump between formfields

Actual behavior:
NVDA does not support many functions of navigation keys in browse mode in MS Office products. In forms, the support for tab navigation is not well consistent.

System configuration:
NVDA version:
all

NVDA Installed or portable:
Both

Other information:

Windows version:
all

Name and version of other software in use when reproducing the issue:
MS Office 2007 and later.

Other questions:

Does the issue still occur after restarting your PC?
yes

Have you tried any other versions of NVDA?
yes, all

[LeonarddeR]

I believe this is blocked by #6944