Add support for italic and underline attributes in shell renderer
Add support for italic and underline attributes in shell renderer

Liangjianghao/powerline,Luffin/powerline,xfumihiro/powerline,cyrixhero/powerline,areteix/powerline,s0undt3ch/powerline,S0lll0s/powerline,darac/powerline,seanfisk/powerline,DoctorJellyface/powerline,darac/powerline,EricSB/powerline,S0lll0s/powerline,QuLogic/powerline,QuLogic/powerline,cyrixhero/powerline,s0undt3ch/powerline,lukw00/powerline,bezhermoso/powerline,kenrachynski/powerline,bezhermoso/powerline,DoctorJellyface/powerline,Liangjianghao/powerline,junix/powerline,Luffin/powerline,seanfisk/powerline,bartvm/powerline,IvanAli/powerline,lukw00/powerline,bartvm/powerline,xfumihiro/powerline,magus424/powerline,bartvm/powerline,dragon788/powerline,magus424/powerline,DoctorJellyface/powerline,russellb/powerline,bezhermoso/powerline,firebitsbr/powerline,russellb/powerline,EricSB/powerline,keelerm84/powerline,xfumihiro/powerline,blindFS/powerline,darac/powerline,keelerm84/powerline,QuLogic/powerline,IvanAli/powerline,xxxhycl2010/powerline,dragon788/powerline,junix/powerline,wfscheper/powerline,s0undt3ch/powerline,Luffin/powerline,prvnkumar/powerline,wfscheper/powerline,prvnkumar/powerline,firebitsbr/powerline,xxxhycl2010/powerline,prvnkumar/powerline,junix/powerline,blindFS/powerline,firebitsbr/powerline,S0lll0s/powerline,russellb/powerline,cyrixhero/powerline,seanfisk/powerline,areteix/powerline,IvanAli/powerline,blindFS/powerline,xxxhycl2010/powerline,areteix/powerline,dragon788/powerline,EricSB/powerline,Liangjianghao/powerline,magus424/powerline,kenrachynski/powerline,wfscheper/powerline,lukw00/powerline,kenrachynski/powerline