gui: initialize search text in the find dialog with selected text in editor file * find_dialog.h: new function init_search_text () * find_dialog.cc (init_search_text): new function, initializes the search text of the file dialog with the slected text of the related editor tab * file-editor-tab.cc (find): call init_search_text after activating the find dialog

--- a/libgui/src/m-editor/find-dialog.h	Tue Jan 29 18:24:16 2013 +0100
+++ b/libgui/src/m-editor/find-dialog.h	Thu Jan 31 19:28:23 2013 +0100
@@ -57,6 +57,7 @@
   Q_OBJECT
   public:
   find_dialog (QsciScintilla* edit_area, QWidget *parent = 0);
+  void init_search_text ();
 
 private slots:
   void search_next ();