New method to get series data points closest to cursor-selected point and UI demo
Playing with different ways to select point nearest to click.
Minor code refactoring. Added suggested VS ignores file.
Demo code to have fewer decimals on axes labels. Ignore file with common patterns.
Changed select to not show cursor and instead have a persistent area. New method to retrieve points within that area.
Hid exploratory code for new method of selecting around a single point.
Minor suggested edits.