title: How to increase click radius in bokeh?
body: <p>I'm doing some simple plotting and would like to increase the usability of my figure.</p>
  
  <p>I have quite a lot of points on my graph and have issues with selecting the ones I want because the click radius is so tiny.</p>
  
  <p>I can increase the circle radius of my point but the radius of the area which displays a tooltip is still only 1 dot. Can I increase the radius somehow without having to create additional points around which respond the same?</p>
  
  <p>Would it be even possible to increase the click detection radius without increasing the actual circle radius?</p>