Project: appceleratorstudio
Issue TISTUD-7721: Allow user to abort "Appcelerator CLI is currently installing or upgrading"
The only way to resolve _Appcelerator CLI is currently installing or upgrading_ is to let users manually delete the {{~/.appcelerator/.installing}} file. The alert should ask the user if he wishes to abort the current installation process. Related Q&A: https://community.appcelerator.com/topic/3439/can-t-setup-cli-correctly-on-windows-7-x64
Story points: 5