Rename example-activity filenames to match urls
Don't need label-sequence in proposed-input/
label sequence's prompt s/b in its "text" property
"base" example for label authoring examples

This activity was actually generated by the smartgraphs-authoring app. It can be extended in further examples to include labels, label sets, label sequences, and other label-using sequences.
Base for example using author-created label set

[#46042907] [#46033683]
Changes for example using author-created label set

[#46042907] [#46033683]
Base for label sequence example

[#46033697]
Changes for label sequence example

[#46033697]