fix bookmark cancellation
These changes in support of AUT-740 concerning KeywordSearch 'Advanced
Keyword Search Configuration' dialog box. Renamed 'Save As' button to
'Copy List'. Added cancel button. Altered logic so that when a copy list
operation is aborted, a dialog no longer pops up saying that the list was
saved.
Fixed log message typos.
Merge branch 'master' of https://github.com/sleuthkit/autopsy