Fix configure hide/show when subprojects present (#2781)

The configure page (`/builds/<id>/configure`) currently has an infinite
recursion issue which causes browsers to kill the process due to high
memory usage when viewing projects with subprojects. This is due to a
vue event handler mistakenly written as a binding.

Author: josephsnyder

resources/js/vue/components/BuildConfigure.vue

@@ -106,7 +106,7 @@
             <td>
               <a
                 class="cdash-link"
-                :click="configure.show = !configure.show"
+                @click="configure.show = !configure.show"
               >
                 <span v-show="!configure.show">View</span>
                 <span v-show="configure.show">Hide</span>