[Assembled constant Preview] Enable range selection for colormap range

Enable writing the range for the colormap or using slides for defining vmin or vmax for both imshow and plotly.

Caching the plotly plot is supported as well, to avoid loading the plot every time during zooming in/out.

Fixing a bug while using get_recent_constant_versions_for_pdu, that needed to always receive values for begin_at_before and begin_at_after

This MR addresses issue: #9 (closed)