Correctly delete first line i RichTextBox
Correctly delete first line i RichTextBox

closes #324

thomkinson/NLog,vladikk/NLog,littlesmilelove/NLog,tetrodoxin/NLog,bjornbouetsmith/NLog,FeodorFitsner/NLog,FeodorFitsner/NLog,BrutalCode/NLog,snakefoot/NLog,rajeshgande/NLog,AqlaSolutions/NLog-Unity3D,rajk987/NLog,tmusico/NLog,ajayanandgit/NLog,babymechanic/NLog,thomkinson/NLog,thomkinson/NLog,RichiCoder1/NLog,littlesmilelove/NLog,BrandonLegault/NLog,pwelter34/NLog,vladikk/NLog,nazim9214/NLog,bryjamus/NLog,zbrad/NLog,ie-zero/NLog,matteobruni/NLog,mikkelxn/NLog,rajk987/NLog,zbrad/NLog,ilya-g/NLog,matteobruni/NLog,MartinTherriault/NLog,michaeljbaird/NLog,mikkelxn/NLog,AqlaSolutions/NLog-Unity3D,fringebits/NLog,fringebits/NLog,hubo0831/NLog,304NotModified/NLog,tohosnet/NLog,vbfox/NLog,hubo0831/NLog,campbeb/NLog,michaeljbaird/NLog,bhaeussermann/NLog,pwelter34/NLog,breyed/NLog,AndreGleichner/NLog,czema/NLog,vladikk/NLog,ilya-g/NLog,ie-zero/NLog,luigiberrettini/NLog,czema/NLog,tohosnet/NLog,breyed/NLog,UgurAldanmaz/NLog,rajeshgande/NLog,fringebits/NLog,RRUZ/NLog,fringebits/NLog,czema/NLog,mikkelxn/NLog,BrandonLegault/NLog,kevindaub/NLog,rajk987/NLog,vbfox/NLog,luigiberrettini/NLog,Niklas-Peter/NLog,rajk987/NLog,kevindaub/NLog,czema/NLog,ArsenShnurkov/NLog,BrandonLegault/NLog,nazim9214/NLog,MartinTherriault/NLog,BrandonLegault/NLog,ArsenShnurkov/NLog,tmusico/NLog,NLog/NLog,AqlaSolutions/NLog-Unity3D,ajayanandgit/NLog,babymechanic/NLog,campbeb/NLog,RichiCoder1/NLog,bryjamus/NLog,AqlaSolutions/NLog-Unity3D,vladikk/NLog,MoaidHathot/NLog,Niklas-Peter/NLog,bjornbouetsmith/NLog,MoaidHathot/NLog,mikkelxn/NLog,BrutalCode/NLog,sean-gilliam/NLog,thomkinson/NLog,RRUZ/NLog,bhaeussermann/NLog,tetrodoxin/NLog,UgurAldanmaz/NLog,AndreGleichner/NLog