"Select all" for various fields

• File picker: https://github.com/getkirby/ideas/issues/385
• Checkboxes: https://github.com/getkirby/ideas/issues/249
• Multiselect: https://github.com/getkirby/ideas/issues/248

We just had this requirement with PHP-based file blueprints where we adjust a checkboxes field based on the file’s content so the number of checkboxes may vary. In this specific case, we show a list of layers which the user can deselect. So having all selected on load would be the ideal state, deselecting consecutively.

Having an option to select/deselect all items in the panel would be very helpful as well as having the option to select all items as default in blueprint.

That ping was useful @Nils Hörrmann https://github.com/getkirby/kirby/pull/7659

Very cool! Thank you :)