Update left.js
Update left.js

#6 - When no icon is available for a given app, display a generic icon in left bar

FIX
libreliodev/javascript,GabrielApG/JavaScript,libreliodev/javascript,libreliodev/javascript,GabrielApG/JavaScript,libreliodev/javascript,GabrielApG/JavaScript,Jayriq/javascript,GabrielApG/JavaScript,Jayriq/javascript,libreliodev/javascript,GabrielApG/JavaScript,Jayriq/javascript,Jayriq/javascript,Jayriq/javascript