support collapsible tabs

[schiebel]

One of the primary functions of the interactive CLEAN viewer is to draw masks, and the convergence plot in its current form takes away valuable screen real estate from the image section, requiring either zooming or greater dexterity/eye-strain to carry out masking. It may be better for it to start in a "minimized" state and appear only when the user explicitly opens it, or move it to a tab alongside the statistics and colormap tab bar, and this would free up space for a larger image pane.

Bokeh does not contain support for collapsible widgets. The Card model that is part of HoloViz Panel, but using this Panel widgets requires that the GUI be started from a "Panel server" which means that the Python commands that to create the GUI and the results returned from the GUI (e.g. interactive clean) are in a separate, single purpose Python session. This "server" requirement does not work for interactive clean where the user interacts with the data in a Python session, runs interactive clean, gets information back from interactive clean, does more analysis and then potentially runs interactive clean again. This requires that the GUI management be integrated into an existing Python session.