PPR Query issues/enhancements

[LiamOSullivan]

• [x] - Add site from chart to map
• [x] - Add site data to popup
• [x] - Highlight map with selected postal code
• [ ] - ~Leaflet dark theme~
• [x] - Style chart tooltips
• [ ] - highlight/ annotate clicked scatter point
• [x] - Center, automargin, clamp layout size
• [x] - Add sources
• [x] - Style modebar
• [ ] - Add explanatory text as per design mockup
• [ ] - Add data fetch spinner
• [ ] - Filter for # sales and/or add additional chart for this. Could plot this on range slider?
• [ ] - Additional filters
• [ ] - Add disclaimer for data/ address search
• [ ] - Add help text
• [ ] - - Add help when address not found see #1508
• [ ] - add Marker when area rect added from successful search via find box

[LiamOSullivan]

The volume of sales could be displayed as per a stock trading chart: