Move 'usersettings' into separate pseudolayer

assets/layers/usersettings/usersettings.json

@@ -0,0 +1,47 @@
+{
+  "id": "usersettings",
+  "description": {
+    "en": "A special layer which is not meant to be shown on a map, but which is used to set user settings"
+  },
+  "title": null,
+  "source": {
+    "osmTags": "id~*"
+  },
+  "tagRenderings": [
+    {
+      "id": "picture-license",
+      "description": "This question is not meant to be placed on an OpenStreetMap-element; however it is used in the user information panel to ask which license the user wants",
+      "question": {
+        "en": "Under what license do you want to publish your pictures?"
+      },
+      "mappings": [
+        {
+          "if": "mapcomplete-pictures-license=",
+          "then": {
+            "en": "No license has been chosen yet"
+          },
+          "hideInAnswer": true
+        },
+        {
+          "if": "mapcomplete-pictures-license=CC0",
+          "then": {
+            "en": "Pictures you take will be licensed with CC0 and added to the public domain. This means that everyone can use your pictures for any purpose."
+          }
+        },
+        {
+          "if": "mapcomplete-pictures-license=CC-BY 4.0",
+          "then": {
+            "en": "Pictures you take will be licensed with CC-BY 4.0 which requires everyone using your picture that they have to attribute you"
+          }
+        },
+        {
+          "if": "mapcomplete-pictures-license=CC-BY-SA 4.0",
+          "then": {
+            "en": "Pictures you take will be licensed with CC-BY-SA 4.0 which means that everyone using your picture must attribute you and that derivatives of your picture must be reshared with the same license."
+          }
+        }
+      ]
+    }
+  ],
+  "mapRendering": null
+}