update params structure for OSM hosted iD (openstreetmap#9095)

* update params structure for OSM iD

update params structure for the iD editor hosted at openstreetmap.org/edit : have to keep the params after a # instead of ?

* working osm editor with-gpx-hash-param link

* update list of query/hash params on osm.org 

Some hash parameters are not supported on osm.org, while there are some query parameters which work slightly differently when used on osm.org 
See https://github.com/openstreetmap/openstreetmap-website/blob/66656e1d1d58e6073efd453007d7452920531b37/app/assets/javascripts/edit/id.js.erb

This should accurately the currently state of the iD integration in the openstreetmap-website (aka as the rails port).

Co-authored-by: Martin Raifer <[email protected]>

Author: answerquest

API.md

@@ -23,7 +23,7 @@ of iD (e.g. `https://ideditor-release.netlify.app`), the following parameters ar
   `boundaries`, `water`, `rail`, `pistes`, `aerialways`, `power`, `past_future`, `others`
 * __`gpx`__ - A custom URL for loading a gpx track.  Specifying a `gpx` parameter will
   automatically enable the gpx layer for display.<br/>
-  _Example:_ `gpx=https://tasks.hotosm.org/project/592/task/16.gpx`
+  _Example:_ `gpx=https://gist.githubusercontent.com/answerquest/9445352b60ca5b44714675eae00f243a/raw/56a6343a29223318f4a697bfd16cbb2c3b8155ad/sample_boundary.gpx`
 * __`hashtags`__ - Prefills the changeset hashtags.  Pass a url encoded list of event
   hashtags separated by commas, semicolons, or spaces.  Leading '#' symbols are
   optional and will be added automatically. (Note that hashtag-like strings are
@@ -65,25 +65,41 @@ of iD (e.g. `https://ideditor-release.netlify.app`), the following parameters ar
 
 ##### iD on openstreetmap.org (Rails Port)
 
-When constructing a URL to an instance of iD embedded in the OpenStreetMap Rails
-Port (e.g. `http://www.openstreetmap.org/edit?editor=id`), the following parameters
-are available as **regular URL query parameters**:
-
-* __`map`__ - same as standalone
-* __`lat`__, __`lon`__, __`zoom`__ - Self-explanatory.
-* __`node`__, __`way`__, __`relation`__ - Select the specified entity.
-* __`background`__ - same as standalone
-* __`disable_features`__ - same as standalone
-* __`gpx`__ - same as standalone
-* __`maprules`__ - same as standalone
-* __`offset`__ - same as standalone
-* __`presets`__ - same as standalone
-* __`comment`__ - same as standalone
-* __`source`__ - same as standalone
-* __`hashtags`__ - same as standalone
-* __`locale`__ - same as standalone, but the default locale is set by the language settings in your OSM user account.
-* __`walkthrough`__ - same as standalone
-
+When constructing a URL to an instance of iD embedded on the [OpenStreetMap website](github.com/openstreetmap/openstreetmap-website/) (e.g. `https://www.openstreetmap.org/edit?editor=id`), the following parameters
+are available as **URL hash parameters**.
+_Example:_ `https://www.openstreetmap.org/edit?editor=id#gpx=https://gist.githubusercontent.com/answerquest/9445352b60ca5b44714675eae00f243a/raw/56a6343a29223318f4a697bfd16cbb2c3b8155ad/sample_boundary.gpx`
+
+* __`map`__
+* __`gpx`__
+* __`background`__
+* __`comment`__
+* __`disable_features`__
+* __`hashtags`__
+* __`locale`__
+* __`maprules`__
+* __`offset`__
+* __`photo`__
+* __`photo_dates`__
+* __`photo_overlay`__
+* __`photo_username`__
+* __`presets`__
+* __`source`__
+* __`validationDisable`__
+* __`validationWarning`__
+* __`validationError`__
+
+For a description of these parameters, refer to the [_iD standalone_ section](#id-standalone) above.
+
+In addition, the following parameters are available as **URL query parameters**:
+
+* __`lat`__, __`lon`__, __`zoom`__<br/>
+  _Example:_ `https://www.openstreetmap.org/edit?editor=id&lat=46.4705&lon=11.2423&zoom=16`<br/>
+* __`node`__, __`way`__, __`relation`__ - Selects the specified OSM object (similar to the `id` parameter of the standalone version of iD).<br/>
+  _Example:_ `https://www.openstreetmap.org/edit?editor=id&node=1`<br/>
+* __`locale`__ - Same as standalone, but the default locale is set by the language settings in your OSM user account.<br/>
+  _Example:_ `https://www.openstreetmap.org/edit?editor=id&locale=de`<br/>
+* __`gpx`__ - Expects a trace ID of a [public gps trace](https://www.openstreetmap.org/traces) uploaded on OpenStreetMap.<br/>
+  _Example:_ `https://www.openstreetmap.org/edit?editor=id&gpx=4009513`<br/>
 
 ## CSS selectors