Selected spots table columns and spot info pop up could be more specific and consistent

The column names "channel" and "unmixed" could be made more explicit by calling them "original channel" and "unmixed channel". or perhaps "reassigned channel" to align with the naming in other places (e.g. mixing matrix heatmap and spots by channel barplot).

similarly, the values in the little pop up when you hover over a spot could be more specific. "unmixed" should say "unmixed channel". Or "unmixed chan" if you want to keep it shorter, or "reassigned channel" if you want to keep it consistent across plot types.

my preference would be to use the terms "original channel" and "reassigned channel" everywhere, but i'd also be ok with other terms, as long as they are consistent in all places.