Generate Project Files is not automatically run after Switch Unreal Engine Version on Mac

When converting a project to a different version of the engine, the GenerateProjectFiles.command process is not ran as it would be on Windows with GenerateProjectFiles.bat. This can cause issues, especially with conversion to 4.10 from 4.9, as 4.10 began using .xcworkspace instead of .xcodeproj which will not appear unless project files are regenerated.

1. Create a new code project, compile it, and then close both the Editor and XCode
2. Right-click the .uproject file for the project and select "Switch Unreal Engine Version" (This could be located under "Services")
3. Convert to any engine version past the current one.
Result: GenerateProjectFiles.command is not run
Expected: GenerateProjectFiles.command should be ran after the conversion takes place, as it does with GenerateProjectFiles.bat on Windows