Merge branch 'ow/stash-count-in-status-porcelain-output'

Allow "git status --porcelain=v2" to show the number of stash entries with --show-stash like the normal output does. * ow/stash-count-in-status-porcelain-output: status: print stash info with --porcelain=v2 --show-stash status: count stash entries in separate function