Jonas Jenwald 47ac706972 Fix page-switching for landscape documents with SpreadModes and PresentationMode (PR 14877 follow-up)
In PR 14877 I forgot to update the horizontal padding, used when computing the scale of the pages, for the case where SpreadModes and PresentationMode are being used together.

Steps to reproduce:
 1. Open the viewer with the default `tracemonkey.pdf` document.
 1. Enable any SpreadMode.
 2. Rotate the document *once*, either clockwise or counterclockwise.
 3. Enter PresentationMode.
 4. Try swithching page, e.g. by clicking on the document.

Expected result:
 The visible pages change as you click.

Actual result:
 The visible pages are "stuck" in the current view.
2022-12-09 14:09:56 +01:00
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