fix(VMenu): use will-change instead of translate hack
fix(VMenu): use will-change instead of translate hack

Prevents CSS conflict with transitions

See 45d4fa9 and 15a5d76

vuetifyjs/vuetify,vuetifyjs/vuetify,Webifi/vuetify,vuetifyjs/vuetify,Phlow2001/vuetify,vuetifyjs/vuetify,Webifi/vuetify,Webifi/vuetify,Phlow2001/vuetify,Phlow2001/vuetify,Phlow2001/vuetify