title: Eclipse CDT convert a "normal folder" to a "source folder" or vice versa
body: <p>Because of me not being used to Eclipse I have projects whose subfolders are mixed "source" and "normal" folders. This is not much of a problem since those are Makefile projects but it bothers me to have my folders not being listed alphabetically (the source folders are displayed first).</p>
  
  <p>I would like to convert my "normal" folders to "source" folders but I can't find anything related in the right click menu on said folders nor in the "properties" window.</p>
  
  <p>Is there a way to convert folder types that doesn't involve editing the <code>.cproject</code> file manually ? If not, can I just edit the <code>sourceEntries</code> tag (it seems to work so far) ?</p>
  
  <p>I am using CDT 8.0.2.</p>