(reference viewer) add radial fitting to Pick plugin
(reference viewer) add radial fitting to Pick plugin

- added a radial fitting curve to Radial plot

rupak0577/ginga,Cadair/ginga,stscieisenhamer/ginga,ejeschke/ginga,naojsoft/ginga,rajul/ginga,pllim/ginga,rajul/ginga,naojsoft/ginga,stscieisenhamer/ginga,rupak0577/ginga,pllim/ginga,naojsoft/ginga,stscieisenhamer/ginga,Cadair/ginga,ejeschke/ginga,ejeschke/ginga,rupak0577/ginga,pllim/ginga,rajul/ginga,Cadair/ginga