I agree the word common when I was a child had nothing to do with class and all to do with morality!
Any behaviour stigmatised as common in women or girls was the type of thing that would lead men to believe we would be easy to get into bed. It covered all the things you have mentioned, plus chipped nail varnish, too much make up, mini-skirts, according to my father, and according to my maternal grandmother silver party shoes, or even worse gold ones, things "no decent woman would ever wear". Being seen without a school hat when otherwise in school uniform AND WITHOUT GLOVES was a mortal sin, in a day and age, when only a very few of our grandmothers still wore both when outside.