pid_plot_readback.ui's Replot button closes plot

[mdwyman]

In caQtDM, the pid_plot_readback screen has a "Replot" button that links back to the screen. Pressing the button closes the screen. It's expected that the plot would stay open.

[mdwyman]

Looking at the Replot button (caRelatedDisplay), it links back to itself but has remove parent set to True. Presumably this is to not duplicate the screen.

caQtDM V4.4.0 is being used.

There are not errors/messages in the caqtdm console when the Replot button used.

[mdwyman]

User could "reload" screen if plot limits are changed. Maybe this button needs removed?

[MarkRivers]

The reload button is historical. It previously worked on medm, where it was allowed to have the related display be the current display, and "remove parent display" checked. This would close the current display and re-open it with the new display limits. However this stopped working in medm many years ago, but the button was never removed. It should be removed now.