* add settings while under development
* very basic tests for roomsummarycard
* empty poll history dialog and option in room summary
* pollS history in settings
* render an ugly list of polls in current timeline
* readonly poll history list items
* fix scroll window
* use short year code in date format, tidy
* no results message + tests
* strict fix
* mock intldatetimeformat for stable date formatting
* extract date format fn into date-utils
* jsdoc
