User check on file open
User check on file open

Re-arranged the check() call inside focus() so the user can see who's using the file when you open a file, not just on tab changes.
Tepira/Codiad,Andrey-Pavlov/Codiad,hoksi/Codiad,dragonro/Codiad,BogusCurry/Codiad,evertton/Codiad,Andr3as/Codiad,Andrey-Pavlov/Codiad,begemot-amp/Codiad,fly19890211/Codiad,justintime4tea/Codiad,AlphaStaxLLC/Codiad,evertton/Codiad,fly19890211/Codiad,begemot-amp/Codiad,cobisimo/Codiad,cobisimo/Codiad,beavis28/Codiad,justintime4tea/Codiad,titiushko/Codiad,titiushko/Codiad,dragonro/Codiad,beavis28/Codiad,l3dlp/Codiad,Andr3as/Codiad,hoksi/Codiad,BogusCurry/Codiad,Tepira/Codiad,justintime4tea/Codiad,dragonro/Codiad,l3dlp/Codiad,dragonro/Codiad,AlphaStaxLLC/Codiad