Refs #10563 Christen the new Refl UI
Refs #10563 Insert TOC manually
Refs #10563 Add "widget" option to interface directive

This option allows you to specify a widget's name to screenshot just
that widget.
Refs #10563 Support custom alignment
Refs #10563 Use widget screenshots in Refl UI docs
Merge branch 'feature/10563_new_refl_ui_offline_documentation' into develop