Debug: note the Built-in variables expander in the operation details PR #3148 moved the nine variables every routine starts with behind their own expander, so the details pane now lists only the variables the routine itself works with. Also corrects the pane's label, which reads "Variables, collections and delta afterwards".
Split Edit Mode page into eight Editing JSON subsections Break the Edit Mode page out into one page per Menu button (Edit Widgets, History, JSON, Widgets, Debug, Assets, Toolbox, Game Settings) under the Editing JSON section of the sidebar. Content is moved unchanged; the JSON page also keeps the editor-wide material (overview, top toolbar, menu, selecting widgets, widget toolbar). Editing JSON gains an overview of the new subsections, and inbound links were updated.