BUG: When using a LogMapper, the PanTool could violate the domain_limits.
BUG: When using a LogMapper, the PanTool could violate the domain_limits.

burnpanck/chaco,burnpanck/chaco,tommy-u/chaco,burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco,tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco,tommy-u/chaco