Fix name tracker
Fix name tracker

- track names changes of selected glyphs only
- better assign free name upon glyph select

cnbin/fontello,marcia-kubik/fontello,SKing7/fontellomt,bartuspan/fontello,liguangmings/fontello,fontello/fontello,liguangmings/fontello,bartuspan/fontello,katgironpe/fontello,cnbin/fontello,asrin475/fontello,marcia-kubik/fontello,bartuspan/fontello,katgironpe/fontello,marcia-kubik/fontello,CapeSepias/fontello,modulexcite/fontello,fontello/fontello,CapeSepias/fontello,CapeSepias/fontello,asrin475/fontello,liguangmings/fontello,vinod1988/fontello,Sivalingaamorthy/fontello,SKing7/fontellomt,modulexcite/fontello,blackgirl/fontello,modulexcite/fontello,vinod1988/fontello,asrin475/fontello,katgironpe/fontello,cnbin/fontello,vinod1988/fontello,Sivalingaamorthy/fontello,fontello/fontello,Sivalingaamorthy/fontello,blackgirl/fontello,blackgirl/fontello