Bump marketing version to 1.3.1

Bump marketing version to 1.3.1

Continue to show update notification on quit if automatic install is …

…enabled

Continue to show update notification on quit if automatic install is …

…enabled

Fix loading of defaults in preferences.

Do availability check on appearance assignment

Resolves git-up#752

Fixes division by 0 in image view calculations.

Also adds PDF size calculations which don't work with CGImage APIs.

Resolves git-up#779

Bump to 1.3

Fix git-up#732: File views regression in 1.2

Replace resize masks with auto layout constraints. Compiling on macOS 11 for backwards compatibility seems to break resize masks in the NSTableView context.

Fix git-up#732: File views regression in 1.2

Replace resize masks with auto layout constraints. Compiling on macOS 11 for backwards compatibility seems to break resize masks in the NSTableView context.