Refactorin the RCW toolbar to use the right tool items types
This patch fixes errors like:
(org.remmina.Remmina:3170303): GLib-GObject-WARNING **: 00:52:21.838: invalid cast from 'GtkToggleToolButton' to 'GtkToggleButton'
(org.remmina.Remmina:3170303): Gtk-CRITICAL **: 00:52:21.838: gtk_toggle_button_get_active: assertion 'GTK_IS_TOGGLE_BUTTON (toggle_button)' failed