Add modal-size option to modal component

app/assets/javascripts/performance_bar/components/detailed_metric.vue

@@ -56,6 +56,7 @@ export default {
     <gl-modal
       :id="`modal-peek-${metric}-details`"
       :header-title-text="header"
+      modal-size="modal-lg"
       class="performance-bar-modal"
     >
       <table

app/assets/javascripts/vue_shared/components/gl_modal.vue

@@ -10,6 +10,11 @@ export default {
       required: false,
       default: null,
     },
+    modalSize: {
+      type: String,
+      required: false,
+      default: '',
+    },
     headerTitleText: {
       type: String,
       required: false,
@@ -48,6 +53,7 @@ export default {
   >
     <div
       class="modal-dialog"
+      :class="modalSize"
       role="document"
     >
       <div class="modal-content">