Changes to UI and server based on suggestions in issues. Summarized as:
- Hover label on maps shows years that apply for the change estimate #2
- Map shows changes between year pairs #3
- Added slider for year comparisons to evaluate coverage changes between year pairs #4
- Fixing coverage estimates to use NAD83(HARN) / Florida West (ftUS) projection (same as SWFWMD seagrass management areas) #6
- Added 1950 and 1982 historical estimates to combined (patchy + continuous) table and maps for segment coverage summaries #7
- Minor fix to seagrass management area boundaries (extended area 6 slightly to the west) #8