[gnome-documents] selections: Unbreak opening in external application

[Debarshi Ray <debarshir src gnome org>]

commit 3a5984e76b71d5150cb55b2d9cdd5cbe99b3e8c1
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Mar 27 18:11:02 2017 +0200

    selections: Unbreak opening in external application
    
    The selection is reset when exiting selection-mode. Hence the selection
    needs to be queried before the mode is changed.
    
    Fallout from e8b2d3431e44d30e4f8edb2c67c600784b81d567
    
    https://bugzilla.gnome.org/show_bug.cgi?id=780602

 src/selections.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/selections.js b/src/selections.js
index d143b1b..f00279c 100644
--- a/src/selections.js
+++ b/src/selections.js
@@ -986,9 +986,9 @@ const SelectionToolbar = new Lang.Class({
     },
 
     _onToolbarOpen: function(widget) {
+        let selection = Application.selectionController.getSelection();
         this._overview.getAction('selection-mode').change_state(GLib.Variant.new('b', false));
 
-        let selection = Application.selectionController.getSelection();
         selection.forEach(Lang.bind(this,
             function(urn) {
                 let doc = Application.documentManager.getItemById(urn);