Preferences fix

app/src/main/java/net/pokeranalytics/android/util/Preferences.kt

@@ -6,7 +6,7 @@ import java.util.*
 
 class Preferences {
 
-    enum class Keys(identifier: String) {
+    enum class Keys(var identifier: String) {
         CURRENCY_LANGUAGE("CurrencyLanguage")
     }
 
@@ -15,13 +15,13 @@ class Preferences {
         fun setString(key: Keys, value: String, context: Context) {
             var preferences = PreferenceManager.getDefaultSharedPreferences(context)
             var editor = preferences.edit()
-            editor.putString(key.toString(), value)
+            editor.putString(key.identifier, value)
             editor.commit()
         }
 
         fun getString(key: Keys, context: Context) : String? {
             var preferences = PreferenceManager.getDefaultSharedPreferences(context)
-            return preferences.getString(key.name, null)
+            return preferences.getString(key.identifier, null)
         }
 
         fun setCurrencyLanguage(language: String, context: Context) {