Refactor overpass support using own implementation of overpass layer.

module/config/config.php

@@ -280,7 +280,11 @@ $GLOBALS['LEAFLET_LAYERS'] = array
             }
 
             return $label;
-        }
+        },
+        'boundsMode' => array(
+            'extend' => true,
+            'fit'    => true,
+        ),
     ),
 );
 

module/dca/tl_leaflet_layer.php

@@ -219,13 +219,11 @@ $GLOBALS['TL_DCA']['tl_leaflet_layer'] = array
                 'overpassQuery',
                 'overpassEndpoint',
                 'minZoom',
-                'overpassCallback',
+                'boundsMode'
             ),
             '+expert' => array(
-                'minZoomIndicatorPosition',
-                'debug',
-                'minZoomIndicatorMessage',
-                'minZoomIndicatorMessageNoLayer',
+                'onEachFeature',
+                'pointToLayer',
             ),
         ),
     ),