Undo location category spelling changes

Close #798

core/base/src/main/java/de/mm20/launcher2/search/Location.kt

@@ -81,7 +81,7 @@ interface Location : SavableSearchable {
             LocationCategory.LIBRARY, LocationCategory.BOOKS -> R.drawable.ic_location_library to R.color.brown
             LocationCategory.COLLEGE, LocationCategory.UNIVERSITY -> R.drawable.ic_location_college to R.color.purple
             LocationCategory.ICE_CREAM -> R.drawable.ic_location_ice_cream to R.color.pink
-            LocationCategory.THEATER -> R.drawable.ic_location_theatre to R.color.purple
+            LocationCategory.THEATRE -> R.drawable.ic_location_theatre to R.color.purple
             LocationCategory.PUBLIC_BUILDING -> R.drawable.ic_location_public_building to R.color.bluegrey
             LocationCategory.CINEMA -> R.drawable.ic_location_cinema to R.color.purple
             LocationCategory.NIGHTCLUB -> R.drawable.ic_location_nightclub to R.color.purple
@@ -112,7 +112,7 @@ interface Location : SavableSearchable {
             LocationCategory.SOCCER -> R.drawable.ic_location_soccer to R.color.green
             LocationCategory.BASKETBALL -> R.drawable.ic_location_basketball to R.color.orange
             LocationCategory.TENNIS -> R.drawable.ic_location_tennis to R.color.orange
-            LocationCategory.FITNESS, LocationCategory.FITNESS_CENTER -> R.drawable.ic_location_fitness to R.color.orange
+            LocationCategory.FITNESS, LocationCategory.FITNESS_CENTRE -> R.drawable.ic_location_fitness to R.color.orange
             LocationCategory.TRAM_STOP -> R.drawable.ic_location_tram_stop to R.color.blue
             LocationCategory.RAILWAY_STATION -> R.drawable.ic_location_railway_stop to R.color.lightblue
             LocationCategory.BUS_STATION, LocationCategory.BUS_STOP -> R.drawable.ic_location_bus_station to R.color.blue
@@ -176,7 +176,7 @@ enum class LocationCategory {
     LIBRARY,
     COLLEGE,
     ICE_CREAM,
-    THEATER,
+    THEATRE,
     PUBLIC_BUILDING,
     CINEMA,
     NIGHTCLUB,
@@ -217,6 +217,7 @@ enum class LocationCategory {
     FITNESS,
     TRAM_STOP,
     RAILWAY_STATION,
+    RAILWAY_STOP,
     BUS_STATION,
     ATM,
     ART,
@@ -226,7 +227,7 @@ enum class LocationCategory {
     PARCEL_LOCKER,
     CHEMIST,
     TRAVEL_AGENCY,
-    FITNESS_CENTER
+    FITNESS_CENTRE
 }
 
 data class OpeningHours(