Revert "simplify binding"

This reverts commit 00b7b81516348f23f76a0e31feab0ff3747da577.
raise the width threshold
explain how to use script-binding gesture without {image}
raise width threshold
extract Usage section
align the first image with --video-unscaled

Even when the script-opt align_images-first_unscaled is false.
use osd-playing-msg-duration
close the console automatically
show errors on the OSD too
simplify condition

Since there are now more mouse bindings that keyboard ones.
add cursor-centric-zoom
don't print playlist-pos when there's 1 playlist entry