Ginga v5.5.0

• fixed default port number for Ginga remote control in the docstring
• fixed an issue with the Pan viewer not redrawing when only the overlay graphics change in the associated channel viewer
• fixed an issue where the Preferences plugin did not show the color distribution algorithm that was saved in the channel correctly
• Added internal support for dask and zarr arrays
• Fixed an issue with the close confirmation dialog under Gtk3 backend
• Adds keyboard mode support for the plot viewer
• Adds thumbnails for plot and table viewer items
• Fixed a mouse scrolling issue for Gtk4 backend
• Fixed an issue where the thumbnail labels were not highlighted correctly in the Thumbs plugin