[3.2.13] Expand and update Jadeite help

[LisaAlmarode]

I've updated some text details as part of the changes for issue #966. It was not immediately obvious what section applies to what feature, and the features are just in a list without any organizing principle.

• the sections needs a leading graphic (e.g. screen shot of a browser with different fonts shown) which will make the text much more understandable.

• the Topics section needs another level of heading, such as Projects Browser, Preferences, etc., or whatever (which could certainly change over time). I suppose packaging would be Rowan Implementation impacting Jadeite.

• the font sections needs to be updated with the changes in 3.2.13 and post 3.2.13 to support named fonts.

• It would be a good habit to add a section each time we do a release. Some that might be useful are the preferences file, transaction handling (I think there is some material that could be lifted from RNs).