[openstreetmap/openstreetmap-website] Add a "tile details" view accessed from the context menu (#1472)

[Ilya Zverev]

Zverik commented on this pull request.



> +  }
+
+  var page = {};
+
+  page.pushstate = page.popstate = function(path) {
+    OSM.loadSidebarContent(path, function () {
+      page.load(path, true);
+    });
+  };
+
+  page.load = function(path, noCentre) {
+    var params = querystring.parse(path.substring(path.indexOf('?') + 1)),
+        lat = parseFloat(params.lat),
+        lon = parseFloat(params.lon),
+        zoom = parseInt(params.zoom),
+        y = lat2y(lat, zoom),

Yes, by multiplying by a tile size. See [this code](https://github.com/openstreetmap/openstreetmap-website/pull/1450/files#diff-7de9168b78d71bcdf442edf8b8aa44b9R72).

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