prefer apple.laf.useScreenMenuBar=true (despite cf. effcfa38e77b) to make it work better with full-screen mode;

ignore vacuous edits (e.g. stemming from Plugin.init_models) to avoid pointless protocol round-trip, which could lead to painting of outdated snapshot in the meantime (notably on Windows);

tuned JEDIT_JAVA_OPTIONS: increase chances that it works with approx. 8 cores and 32bit platform (notably Windows);

propagate keys to enclosing view like org.gjt.sp.jedit.gui.CompletionPopup, but without its KeyEventInterceptor;

premature window close means failure;

less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;

proper return code on window close;

more precise Local_Theory.level: 1 really means main target and >= 2 nested context; explicit target for context within global theory with after_close = exit to manage the 2 levels involved here; reject "(in target)" for nested contexts more reliably -- difficult to handle due to lack of nested reinit;

more direct property names;

tuned -- less indirection;