78b83266e3
Introducing serendipity.toggle_collapsible, which – is a reusable function available via the serendipity namespace – has arguments to customize the show/hide icon, but also has sensible default fallbacks for those arguments – creates an individual key in localStorage to store the open/ close state in The latter also fixes a bug(?) which made show/hide in the entry editor save the state for entry metadata and advanced options in the same localStorage key. This could be improved with a fallback for toggling elements which don't have an id. References #144