Made IsContextLost automatically set the flag by checking with the emscripten WebGL wrapper + added a LOT of logging messages right before throwing ErrorCode_BadSequenceOfCalls exceptions + increased the http request timeouts from 60 to 600 sec (big datasets in some recent customer use cases) + added IsContext lost through the Viewport/Context layer (to make it reachable from external API) + the same for the underlying device context (for debug)

{
  "Plugins": [
    "/usr/local/share/orthanc/plugins/libOrthancWebViewer.so",
    "/usr/local/share/orthanc/plugins/libServeFolders.so"
  ],
  "StorageDirectory" : "/var/lib/orthanc/db",
  "IndexDirectory" : "/var/lib/orthanc/db",
  "RemoteAccessAllowed" : true,
  "AuthenticationEnabled" : false,
  "ServeFolders" : {
    "AllowCache" : false,
    "GenerateETag" : true,
    "Folders" : {
      "/stone" : "/root/stone"
    }
  }
}