Fix v-btn modifier triggering twice (#2487)
Fix v-btn modifier triggering twice (#2487)

* normalize event name added, click modifier duplicated resolved

* Removed util function, replaced &~! chars

* Replaced regex

* Used Object.assign instead of spread operator

* style: move some newlines around

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