Rotate landscape pages, during printing, by default in the viewer (enablePrintAutoRotate = true)

While this will perhaps not be perfect for *every* PDF document with mixed page orientation, based on the large number of bugs/issues seen over the years I'm however pretty convinced that it'll be an overall improvement in a majority of cases.

In order to improve things further, we'd probably need Firefox to support e.g. `@page` such that the viewer can provide better information to the print engine.

extensions/chromium/preferences_schema.json

@@ -173,7 +173,7 @@
       "title": "Automatically rotate printed pages",
       "description": "When enabled, landscape pages are rotated when printed.",
       "type": "boolean",
-      "default": false
+      "default": true
     },
     "scrollModeOnLoad": {
       "title": "Scroll mode on load",

web/app_options.js

@@ -62,7 +62,7 @@ const defaultOptions = {
   },
   enablePrintAutoRotate: {
     /** @type {boolean} */
-    value: false,
+    value: true,
     kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
   },
   enableScripting: {