[MAC ONLY] Attempting to Delete a Locked Folder displays incorrect message

[JeffryBooher]

Create a project
Add a folder
Get info for the folder in finder
Check the "Locked" property
Go back to Brackets
Try to delete the folder
==> "File could not be read"

[encadyma]

I changed it to "The file/directory could not be found.". Is this fine for this?

[encadyma]

OK, creating pull request. Please let me know if the message needs to be changed. :) @JeffryBooher