Jonas Jenwald 69462e5e14 Export additional constants in the viewer components
In addition to the existing `LinkTarget` constant, used by the `PDFLinkService`-constructor, this patch exports the following constants in the viewer components:
 - `ScrollMode` and `SpreadMode`, since the `BaseViewer` has getters/setters which work with those constants.
 - `RenderingStates`, since that one may be helpful when using `PDFPageView` directly.
2022-08-11 16:22:07 +02:00
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