Addresses OpenHistoricalMap/issues#355 simply, by never adding the OS…

…M layer to ide.map. Also corrects the instantiation of the attribution control, which does not work and is inherited upstream. Will submit an issue/PR there.

js/ide.ts

@@ -477,7 +477,7 @@ class IDE {
 
     // init leaflet
     ide.map = new L.Map("map", {
-      attributionControl: true,
+      attributionControl: false,
       minZoom: 0,
       maxZoom: configs.maxMapZoom,
       worldCopyJump: false
@@ -490,8 +490,9 @@ class IDE {
       maxNativeZoom: 19,
       maxZoom: ide.map.options.maxZoom
     });
-    ide.attribControl = new L.Control.Attribution({prefix: false});
-    ide.attribControl.addAttribution(tilesAttrib);
+    const attribControl = new L.Control.Attribution({position: "bottomright"});
+    attribControl.addAttribution(tilesAttrib);
+    attribControl.addTo(ide.map);
     const pos = new L.LatLng(settings.coords_lat, settings.coords_lon);
     ide.map.setView(pos, settings.coords_zoom);
     //  .addLayer(tiles);