[1.2-alpha] Update 'Current Page' to 'Current View' on opening a multipage document

Summary:

When opening a multipage document, the "Current Page" marker will always point to the first page.

You were working (for example) in page 15 and close the document. If, after opening the document again, you press "5" to zoom to page, it will move you to the first one instead of the one in front of you where you (might) have been working.

Request

Save the "Current Page" marker somehow.

If it's saved in the file, it would open Pandora's Box, so I think in the user config file (like the "recent" file list) would be advisable instead.