Split the News panel into Conflicts and Local

Conflicts is the hotspots' significant news, on the map whenever the layer is
on. Local lists every report within 500 km of the view centre below 3,000 km,
and the map shows those instead while it is chosen. The section replaces the
"Include minor news" and "Show event cards" toggles: picture cards are always
on, and Local is what reads minor news. The Conflicts feed reads the same
whichever section is shown.

src/i18n/same-as-english.json

@@ -262,6 +262,7 @@
     "Jazz",
     "LOCAL",
     "Landsat 8/9",
+    "Local",
     "MIC",
     "MIL",
     "MINI",
@@ -421,6 +422,7 @@
     "LOCAL",
     "Landsat 8/9",
     "Landsat 8/9 via HLS",
+    "Local",
     "Los Angeles",
     "MIC",
     "MIL",
@@ -822,6 +824,7 @@
     "Landsat 8/9",
     "Landsat 8/9 via HLS",
     "Layout",
+    "Local",
     "Los Angeles",
     "MIC",
     "MIL",