v9.1.5

Changes since 9.14, most to improve batch mode.

• fix managedstring print in snip
• don't save column open / closed state, loading a closed column can crash
• fix print of list of strings
• remove -p option from snip (it's automatic now)
• fix filename increment
• fix [option] handling in filename expand
• add tests for snip cli

flatpak and macOS should be available, win binaries below.

edit: win binaries updated on 10 June to include gtk 4.23.1 and openslide 4.0.1