Add dashboard charts and other improvements

Dashboard charts

• Improved dashboard flot: parse binding in onChanges, documentation
• Add dashboard graph with chart.js #7
• Add extra styles for chart panels
• Add colours binding to dashboard flot graph and improve re-plot
• Add dashboard bars graph component #7

Other

• Fix paginator no-focus when many pages and user was hitting first/last
• Add aria attributes to ga-progress and improve binding
• Minor documentation fixes

⚠️ Updating to this version requires to change the ga-progress bindings.