Marker on hover with shared tooltip appears inconsistently

[morganfree]

Expected behaviour

Hovering over point causes showing the marker - even if the data is dense.
http://jsfiddle.net/2tjq74te/6/

Actual behaviour

With shared tooltip the marker is not always displayed over hovered point.

Live demo with steps to reproduce

http://jsfiddle.net/2tjq74te/7/

[pawelfus]

Internal note:
Fails since 27f81b8

[idrm]

The affected marker is always the one that would normally capture the hover state were the tooltip not shared (tested in version 5.0.0).

The other trigger for this behavior appears to be a datetime x-axis. The markers appear as they should when, for example, the x-axis uses categories instead.

[pawelfus]

Hi @idrm

Thank you for your feedback. Actually, datetime axis was not important, but number of points: http://jsfiddle.net/dk6x2phu/

@TorsteinHonsi - could you review the commit above before releasing 5.0.1? It also cleans up runPointActions method..