title: Highmaps label centering in irregular path
body: <p>While working on Highmap to display some sort of data according of an area coverage. I was able to create the map with bubble chart type but I face one major problem, alignment! Each bubble is aligned to the area/path it belongs to; basically I have two series <code>s1: {id, z, path}</code> <code>s2: {id, z, path}</code> where these series are <code>joinedBy: id</code> field. I think Highmaps calculates the center according to the width and height of the path resulting some bubbles to be placed in another area. Is there any ways I can fix this by setting offset left/top per each path, since the paths are irregular and could have a different shapes?</p>
  
  <p>Please refer to the attached image and this jsfiddle: <a href="http://jsfiddle.net/ycsp27cL/14/" rel="nofollow noreferrer">http://jsfiddle.net/ycsp27cL/14/</a>
  <a href="https://i.stack.imgur.com/XoEQ8.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XoEQ8.jpg" alt="Gray Bubble: actual bubbles created by Highmaps.  Red Bubble: the expected bubble area"></a></p>
  
  <p><strong>Gray Bubble</strong>: actual bubbles created by Highmaps.<br>
  <strong>Red Bubble</strong>: the expected bubble area</p>