Add max width to task group tooltips (#22978)
Add max width to task group tooltips (#22978)

Add a max width to the tooltip css class to make long task group descriptions wrap.

Fixes: https://github.com/apache/airflow/issues/22912

Before:
<img width="1680" alt="Screen Shot 2022-04-13 at 9 12 54 AM" src="https://user-images.githubusercontent.com/4600967/163188297-e7369d02-bb87-42de-8827-4de0884a9e62.png">


After:
<img width="612" alt="Screen Shot 2022-04-13 at 9 11 52 AM" src="https://user-images.githubusercontent.com/4600967/163188319-7ede8211-25e4-4f9d-8edf-a0ed1a7c47b6.png">


cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,danielvdende/incubator-airflow,cfei18/incubator-airflow,apache/airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,apache/airflow,apache/airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,lyft/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,lyft/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,apache/airflow,nathanielvarona/airflow,cfei18/incubator-airflow,apache/airflow,danielvdende/incubator-airflow