[file-roller] Fix Add Files dialog button sensitivity

[Paolo Bacchilega <paobac src gnome org>]

commit f9e2c9a745683819f5b5c69d7adbbf6907a771f4
Author: David King <dking redhat com>
Date:   Wed May 4 19:43:52 2016 +0100

    Fix Add Files dialog button sensitivity
    
    When the Add Files dialog has previously been opened and there are
    selected files, the selection is restored for subsequent views of the
    dialog. However, the sensitivity of the Add button is only updated when
    manually selecting a file, as the dialog only updates the sensitivity
    in response to the GtkCellRendererToggle for the selected state being
    changed. When setting a list of selected files on the dialog, as done
    when restoring the list of selected files on subsequent views of the
    dialog, the Add button is only ever set to be insensitive.
    
    Fix this by updating the Add button sensitivity after the list of files
    has been loaded.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=738177

 src/fr-file-selector-dialog.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/fr-file-selector-dialog.c b/src/fr-file-selector-dialog.c
index 0e87b02..017df88 100644
--- a/src/fr-file-selector-dialog.c
+++ b/src/fr-file-selector-dialog.c
@@ -882,6 +882,7 @@ get_folder_content_done_cb (GError   *error,
 
        gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (GET_WIDGET ("files_liststore")), 
sort_column_id, sort_order);
        set_current_folder (self, load_data->folder);
+       _update_sensitivity (self);
 
        if (load_data->dialog->priv->current_operation == load_data)
                load_data->dialog->priv->current_operation = NULL;