/// <summary>
/// Ensures that the specified <see cref="ContainerPage"/> is started, regardless of whether or not it is visible.
/// </summary>
protected void EnsureStarted(ContainerPage page)
{
PageHost host = _mapPageToHost[page];
if (!host.IsStarted)
{
page.Component.ModifiedChanged += Component_ModifiedChanged;
host.StartComponent();
}
}