been accounted for; switch to each unsaved file before showing the
unsaved dialog.
Remove limit of ~256 chars for session filenames.
Make dialogs_show_unsaved_file() fail if the Save As dialog was
cancelled.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@972 ea778897-0a13-0410-b9d1-a72fbfd435f5