/// <summary>
/// Ensures that the specified <see cref="ContainerPage"/> is stopped, regardless of whether or not it is visible.
/// </summary>
/// <param name="page"></param>
protected void EnsureStopped(ContainerPage page)
{
PageHost host = _mapPageToHost[page];
if (host.IsStarted)
{
host.StopComponent();
page.Component.ModifiedChanged -= Component_ModifiedChanged;
}
}