Update Auspice config for Nextclade tree

This makes a few various updates to the Auspice config for the Nextclade tree including:
1. Making "clade_membership" default coloring. For this tree, we really care about MeV Genotype more than other colorings.
2. Call this "MeV Genotype (Nextstrain)". I think important to specify MeV Genotype to distinguish from the more common SNP-level genotype.
3. Clarify with "MeV Genotype (GenBank metadata)". The previous "(NCBI)" seemed like this could be a MeV Genotype call from an NCBI tool.
4. Order as Region then Country to follow ncov
5. Include clade_membership as filter option

nextclade/defaults/auspice_config.json

@@ -17,41 +17,43 @@
       "type": "continuous"
     },
     {
-      "key": "country",
-      "title": "Country",
+      "key": "clade_membership",
+      "title": "MeV Genotype (Nextstrain)",
       "type": "categorical"
     },
     {
       "key": "region",
       "title": "Region",
       "type": "categorical"
     },
+    {
+      "key": "country",
+      "title": "Country",
+      "type": "categorical"
+    },
     {
       "key": "genotype_ncbi",
-      "title": "Genotype (NCBI)",
+      "title": "MeV Genotype (GenBank metadata)",
       "type": "categorical"
     },
     {
       "key": "is_reference",
-      "title": "WHO reference",
+      "title": "WHO Reference",
       "type": "categorical"
-    }, 
-    { 
-      "key": "clade_membership", 
-      "title": "Genotype (augur clades)", 
-      "type": "categorical" 
     }
   ],
   "geo_resolutions": [
     "country",
     "region"
   ],
   "display_defaults": {
-    "map_triplicate": true
+    "map_triplicate": true,
+    "color_by": "clade_membership"
   },
   "filters": [
-    "country",
+    "clade_membership",
     "region",
+    "country",
     "author"
   ],
   "metadata_columns": [