* cp_gr_rep: display the radio buttons for select graph range
* cp_gr_rep: zooming now use 0..-1 range instead of -40..-1
* period selector added
* logging added
* cp_gr_rep: now chart is zoomed to min/max range
* cp_gr_rep: removed preview textbox and log is hidden
* cp_gr_rep: now change scale of the graph does not change the current selected position