private void TracebackFilter_FilterChanged(object sender, EventArgs e)
{
var filter = MainWindow.FilterToRegex(TracebackFilter.Filter);
GraphHistogram.FunctionFilter = DeltaHistogram.FunctionFilter = DeltaList.FunctionFilter = FunctionFilter = filter;
if (PendingRefresh != null)
PendingRefresh.Dispose();
PendingRefresh = Start(RefreshDeltas());
}