Jonas Jenwald 48f4580991 A couple of small BaseViewer tweaks
- Mark `BaseViewer.initializeScriptingEvents` as an `async` method, since that's actually how it's being used in the default viewer (see `PDFViewerApplication-_initializeJavaScript`).

 - Change `BaseViewer._pageWidthScaleFactor` to access the *internal* scroll/spread-modes directly, rather than using the getters, since that's consistent with the rest of the code (and not just for these properties).
2021-02-14 12:32:50 +01:00
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