manual selection of syntax highlighter

sometimes files do not have a file extension, one needs to be able to select the syntax style manually

(from redmine: issue id 2107, created on 2015-01-28 by gmueller, closed on 2015-02-18)

• Changesets:
  • Revision 1933 by Thorben Quast on 2015-02-18T12:22:32Z:

editor: fix #2107

• Revision 1933 by Thorben Quast on 2015-02-18T12:22:32Z:

editor: fix #2107