Add the possibility to snap onto another layer with imports, add location confirm on input, add metalayer exporting all nodes, various fixes

assets/layers/type_node/type_node.json

@@ -0,0 +1,12 @@
+{
+  "id": "type_node",
+  "description": "This is a special meta_layer which exports _every_ point in OSM. This only works if zoomed below the point that the full tile is loaded (and not loaded via Overpass). Note that this point will also contain a property `parent_ways` which contains all the ways this node is part of as a list",
+  "minzoom": 18,
+  "source": {
+    "osmTags": "id~node/.*"
+  },
+  "mapRendering": [],
+  "name": "All OSM Nodes",
+  "title": "OSM node {id}",
+  "tagRendering": [ ]
+}