Docs: Adding information on using native browser functionality

Docs: Adding information on using native browser functionality

The section on setting a home page seemed out of place in the Log in section.
I moved it to a new section that covers best practices for using the browser,
which also includes earlier documentation on using tabs and new documentation
on disabling popup blockers.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>