Add new feature. SWA detection in the tool menu bar. May not so stable, and I suggest to only detect SWA in the NREM state, which you can select in the dialog, or it will take a lot of time to run the detection. Also you can check the notebook in [script](https://github.com/bian-lab/scripts/blob/master/signal_process/activities_detection/swa_detection.ipynb) for a step-by-step code.