Current use of IPywidgets not entirely compatible with version 7

[upnix]

As I understand from this issue, using Output.append_display_data() with IPywidgets 7 will result in appended widgets not being "captured" by the Output widget. This is not a problem with IPywidgets 8.

It is, however, a problem for my notebook, as I've been creating tables using lots of little Output widgets. When run on Google Colab I discovered that these tables look like a mess.

Google Colab, as it turns out, is now the targeted platform for my workshop.

[upnix]

I've fixed most of this, but I'm still missing titles on the Accordion help sections ("Help searching rainbow tables," "Step-by-step")