Reuse the existing source archive folders after restart (to be able to
keep breakpoint markers in source archives across sessions)
remove the breakpoint listener : it doesn't do anything
Explicitly fire breakpoint update events for source archives
A new utility function
Override the path and project for source archive files
new SourceArchiveEditorInput for source archive files.
This allows managing breakpoints, and also opened editor retrieval, more
cleanly.
Make the new SourceArchiveEditorInput read-only
(since by default it not because refining FileEditorInput)