more conventional synchronized access to Options_Variable -- avoid Swing_Thread getting in the way, which might be absent in some environments (e.g. SWT);

added missing file;

tuned signature -- avoid intrusion of slightly odd Swing structures into pure Markup_Tree;

tuned signature -- concentrate GUI tools;

tuned signature -- concentrate GUI tools;

separate module "GUI", to keep this out of the way of generic Isabelle_System operations, notably for non-Isabelle/jEdit applications; tuned signature;

separate module Isabelle_Font, to keep this out of the way of generic Isabelle_System operations, notably for non-Isabelle/jEdit applications;

tuned imports;

added var_position in analogy to longid_position, for typing reports on input; avoid duplicate token var report;

removed unnerving (esp in jedit) and pointless warning

tuned

merged

tuned;

recover implicit thread position for status messages (cf. eca8acb42e4a);

additional timing status for implicitly forked terminal proofs -- proper accounting for interactive Timing dockable etc.;

more explicit Goal.fork_params -- avoid implicit arguments via thread data; actually fork terminal proofs in interactive mode (amending 8707df0b0255);