[gnome-control-center] online-accounts: Fix widgets added by GOA being invisible

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit a3b2725dfae3001a6158c9a97bba56212654b124
Author: Robert Ancell <robert ancell canonical com>
Date:   Fri Mar 22 16:25:30 2019 +1300

    online-accounts: Fix widgets added by GOA being invisible
    
    Fixes #362

 panels/online-accounts/cc-online-accounts-panel.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/panels/online-accounts/cc-online-accounts-panel.c 
b/panels/online-accounts/cc-online-accounts-panel.c
index 6503c6633..186c704f8 100644
--- a/panels/online-accounts/cc-online-accounts-panel.c
+++ b/panels/online-accounts/cc-online-accounts-panel.c
@@ -613,6 +613,11 @@ show_page_account (CcGoaPanel  *panel,
                                  GTK_BOX (panel->accounts_vbox),
                                  NULL,
                                  NULL);
+      /*
+       * The above call doesn't set any widgets to visible, so we have to do that.
+       * https://gitlab.gnome.org/GNOME/gnome-online-accounts/issues/56
+       */
+      gtk_widget_show_all (GTK_WIDGET (panel->accounts_vbox));
     }
 
   provider_name = goa_account_get_provider_name (account);