Supply event in click event passthrough

aleksis/core/frontend/components/generic/buttons/BaseButton.vue

 <template>
-  <v-btn v-bind="{ ...$props, ...$attrs }" @click="$emit('click')">
+  <v-btn v-bind="{ ...$props, ...$attrs }" @click="$emit('click', $event)">
     <slot>
       <v-icon v-if="iconText" v-text="iconText" left/>
       <span v-t="i18nKey"/>