When I click on the little hourglass in Thought Properties, I get a list of changes to that thought.
For some thoughts, the list is quite long.
What am I supposed to do with the list? For example, I see that a year ago on December 7, 2016 there's "Changed note" but I can't see the changes and I can't revert to a previous version of the thought. Actually, I don't really care what the changes were a year ago.
What is the point of tracking changes forever?
What do the colors mean? I see grey, pink and purple, with three shades of each, along with white.