Focus line input after selecting character/character group (#534)

Author: Tim020

client/src/vue_components/show/config/script/ScriptLinePart.vue

@@ -150,6 +150,7 @@ export default {
     stateChange() {
       this.$v.state.$touch();
       this.$emit('input', this.state);
+      this.$refs.partInput.focus();
     },
   },
 };