[gnome-boxes] properties-toolbar: Add click_back_button()

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 5b49b21377c421fe554b82869d4a7c1f83494a4a
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Thu Dec 4 17:04:35 2014 +0000

    properties-toolbar: Add click_back_button()
    
    Add API to click the appropriate back button in the properties topbar,
    depending on which headerbar is current.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741047

 src/properties-toolbar.vala |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/properties-toolbar.vala b/src/properties-toolbar.vala
index 475c99c..c717c6e 100644
--- a/src/properties-toolbar.vala
+++ b/src/properties-toolbar.vala
@@ -42,6 +42,13 @@ private class Boxes.PropertiesToolbar: Gtk.Stack {
         window.notify["ui-state"].connect (ui_state_changed);
     }
 
+    public void click_back_button () {
+        if (page == PropsWindowPage.MAIN)
+            main_back_button.clicked ();
+        else
+            troubleshooting_back_button.clicked ();
+    }
+
     [GtkCallback]
     private void on_main_back_clicked () requires (page == PropsWindowPage.MAIN) {
         props_window.revert_state ();