[latexila] MainWindowFile: activate app.new-window action

[Sébastien Wilmet <swilmet src gnome org>]

commit 6db29dfddd8ec65b16e9b07a66b415847927ce46
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Nov 6 16:10:20 2015 +0100

    MainWindowFile: activate app.new-window action
    
    It's a tiny step towards using GMenu/GAction.

 src/main_window_file.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/main_window_file.vala b/src/main_window_file.vala
index 0743e91..7401dff 100644
--- a/src/main_window_file.vala
+++ b/src/main_window_file.vala
@@ -142,7 +142,7 @@ public class MainWindowFile
 
     public void on_new_window ()
     {
-        LatexilaApp.get_instance ().create_window ();
+        LatexilaApp.get_instance ().activate_action ("new-window", null);
     }
 
     public void on_file_open ()