CHICAGO — Most kids were wearing face coverings as they entered Park Manor Elementary School on Monday, even as Chicago Public Schools relaxed its mask rules for students and staff. The school — in the Greater Grand Crossing community on the South Side — has struggled with COVID-19, especially heading into the winter break in December. Twenty-four people were in quarantine or isolation Sunday, after a positive case was detected at the school last week, according to CPS data. “I’m not comfortable with the masks getting taken off. It’s too soon. It’s really too soon,” parent Rosheena Green said …