[TRAC-4936] trace of points in Grapics 2 shows in Graphics 1
The trace of points in Graphics 2 defined from Spreadsheet also show in Graphics 1. If the points are moved to Graphics 1, the trace shows only in Graphics 1. See the image below, the 5 points can be seen as the black outlines in Graphics 2, but the trace (without the points) also appears in Graphics 1. The problem persists if the slider is moved to Graphics 1. The trace of a Graphics 2 point that is not defined via the Spreadsheet does not also appear in Graphics 1.