Guietta

Changed
- Fixed 'with' syntax bug on Python 3.11+

Added
- Led class

Added
- Widget groups to set/get multiple widgets using any Python iterable
- ValueSlider editbox now has a name, allowing it to be referenced

Changed
- Removed debug output
- Fixed bug preventing "execute_in_main_thread" decorator to work
when "execute_in_background" is not used as well.

Added
- keyword "projection" to matplotlib M() widget,
passed internally to add_subplot.

Added
- HeartBeat widget

Changed
- Inverted import order of PyQt5 and PySide2,
giving priority to PyQt5 to fix compatibility
problems with matplotlib