Add possibility to run selected text of the editor in the terminal * octave-qscintilla.cc(contextMenuEvent): new context menu for running selection (context_run): function for run selection action in editor file menu; (contextmenu_run): new slot for context menu run selection; * octave-qscintilla.h: new functions context_run, contextmenu_run * file-editor-tab.cc(context_run): new slot for run menu action * file-editor-tab.h: new slot context_run * file-editor.cc(request_context_run): new slot for run menu entry; (construct): new entry in run menu for running the selection in editor (add_file_editor_tab): connect new signal fetab_context_run to the new slot context_run in file_editor_tab; (set_shortcuts): enable/disable new shortcut when editor focus changes (check_actions): enable/disable new action depending on existing tabs * file-editor.h: new signal fetab_context_run, new slot request_context_edit, new run action

--- a/libgui/src/m-editor/file-editor-tab.cc
+++ b/libgui/src/m-editor/file-editor-tab.cc
@@ -484,6 +484,15 @@
 }
 
 void
+file_editor_tab::context_run (const QWidget *ID)
+{
+  if (ID != this)
+    return;
+
+  _edit_area->context_run ();
+}
+
+void
 file_editor_tab::toggle_bookmark (const QWidget *ID)
 {
   if (ID != this)