Move attribution handling to seperate file.

assets/maps/src/Contao.js

@@ -297,28 +297,6 @@ L.Contao = L.Class.extend({
     }
 });
 
-/**
- * Attribution handling.
- */
-L.Contao.Attribution = {
-    setPrefix: function(prefix) {
-        if (prefix.indexOf(L.Contao.ATTRIBUTION) === -1) {
-            prefix += L.Contao.ATTRIBUTION;
-        }
-
-        this.options.prefix = prefix;
-
-        this._update();
-        return this;
-    }
-};
-
-L.Control.Attribution.addInitHook(function() {
-    this.options.prefix += L.Contao.ATTRIBUTION;
-});
-
-L.Control.Attribution.include(L.Contao.Attribution);
-
 /**
  * Start Contao integration.
  */

assets/maps/src/Mixin.Attribution.js

@@ -0,0 +1,19 @@
+/**
+ * Attribution handling.
+ */
+L.Control.Attribution.addInitHook(function() {
+    this.options.prefix += L.Contao.ATTRIBUTION;
+});
+
+L.Control.Attribution.include({
+    setPrefix: function (prefix) {
+        if (prefix.indexOf(L.Contao.ATTRIBUTION) === -1) {
+            prefix += L.Contao.ATTRIBUTION;
+        }
+
+        this.options.prefix = prefix;
+
+        this._update();
+        return this;
+    }
+});