Better error log in fetch failure callback + timeout 600sec in OrthancRestApiCommand + guard against dead controller access in PanSceneTracker + relaxed DicomStructureSet AddReferenceSlice method to accept extraneous adds of the same slice (while trying to understand how it happens in the first place)

{
    "extends" : "./tsconfig-samples",
    "compilerOptions": {
        // "outFile": "../build-web/app-simple-viewer-single-file.js"
    },
    "include" : [
        "simple-viewer-single-file.ts"
    ]
}