fix($browser): Improperly styled nested expansion-panels
fix($browser): Improperly styled nested expansion-panels

Fixed a CSS declaration bleeding into children causing their icons to appear active as well

fixes #2141

Phlow2001/vuetify,vuetifyjs/vuetify,Webifi/vuetify,vuetifyjs/vuetify,Webifi/vuetify,azaars/vuetify,vuetifyjs/vuetify,azaars/vuetify,vuetifyjs/vuetify,KaelWD/vuetify,Phlow2001/vuetify,Phlow2001/vuetify,Webifi/vuetify,KaelWD/vuetify,KaelWD/vuetify,Phlow2001/vuetify