[PLOT_VIEW] Undo filtering with "F" does not work in plot with multiple axis rectangles

[svlad-90]

How can one reproduce it?

1. Create a plot with multiple axis rectangles ( at least 2 ) and with multiple graphs on each axis rectangle
2. Try selecting a point on any graph and press "F" to filter out that graph
3. Press "F" again to undo the filtering

The third operation will not work. The single filtered graph will remain on the axis rect. There is a bug in this feature that appears when the plot is complex.