title: PyQt5 pyqtgraph (adding/removing) curves in a single plot
body: <p>I'm new to pyqt5 and am just looking for some direction.</p>
  
  <p>In a single pyqtgraphics PlotItem Graph I would like to add/remove configurable PlotCurveItems.
  I started with QWidgetList items but it seems that will not provide me the ability to add the same ListItem->functions with multiple configurations.</p>
  
  <p>As a next step I'm looking at using Parameter Trees but am not sure if I am just making things more complicated.
  Ultimately I would like to use the PlotItem.addItem() to run a configurable function/method and view a list of Items I have added that I can remove or reconfigure.</p>
  
  <p>Thanks in advance.</p>