Robocorp Lab version (2.12.4)

• Added help menu items for user guide, tutorials, keyboard shortcuts and Robot Framework libraries
• Added button for downloading example activities to user specified folder
• Speeded up loading when yaml files are unchanged
• Moved Jupyter roaming data under application specific directory
• Windows: Reduced log prints during environment removal
• macOS: Fixed cmd-Q and cmd-W functionality
• macOS: GCC is not required anymore during installation (updated dependency on RPA Framework)