Need expanded documentation and tutorials for TabularEditor

[timdiller]

TabularEditor is a very useful UI component that enables a wide range of capability in a TraitsUI application. The current documentation is limited, and parts of it are presented relative to TableEditor, which requires reading and understanding TableEditor. The TabularEditor document could be improved by the following:

• Include a range of demos, from a minimal working example, to the currently existing, more fully featured Tabular_editor_demo.py and Tabular_editor_with_context_menu_demo.py. It would help to include separate examples demonstrating individual features like including images in a row, responding to a change in selected row, and using properties to generate text for the columns. In addition, the existing demos could be reformatted for readability. At least Tabular_editor_demo.py is a little hard to navigate because of vertically formatted lists of names.
• TabularEditor is important enough that it probably deserves its own separate tutorial.
• Images is the current documentation could be updated to reflect renderings in more-recent OSes. The current MS Windows rendering is looking pretty dated.

[corranwebster]

While all this is valid, there is now substantial documentation on the tabular adapter class and how to use it here: https://docs.enthought.com/traitsui/traitsui_user_manual/adapters.html#the-tabularadapter-class

[timdiller]

@corranwebster thanks for pointing me to the more elaborate documentation. By long habit, I only looked at the documentation describing the TabluarEditor, which has a subsection for TabluarAdapter, and I wrongly assumed that was everything we had to say about it. May I suggest, as a small and easy improvement, that the subsection referred to above contain a link to the more-substantial and -useful documentation you pointed me to?