make legislation changelog table  accessible plus ui tweaks - fix: table takes up full width - fix: title is now a caption - fix: add role and summary
make legislation changelog table  accessible plus ui tweaks
- fix: table takes up full width
- fix: title is now a caption
- fix: add role and summary

troy-open-data/legislative_twitter,leesharma/legislative_twitter,leesharma/legislative_twitter,troy-open-data/legislative_twitter