[ENH] PCA: Add lines and labels showing the explained variance #1383
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Ticket 133 from the to-do list wants "PCA widget: vertical bar should travel in grid (dimensions are integers). Also, mark the intersection of the bar with a dot, and show the projection like of the two dots to the y axis."
Rounding was already implemented (with errors). I added the lines, but also numeric labels, which make the lines redundant. @BlazZupan, do I keep the lines (in this case, you can merge the PR) or do the number suffice?