message: Added :open to GameSelectionScreen.vue
diff: <template>
  <div>
  - <modal v-show="showPlatformModal === true" @close-modal="() => {showPlatformModal = false;}" class="z-max z-top">
  + <modal v-show="showPlatformModal === true" :open="showPlatformModal" @close-modal="() => {showPlatformModal = false;}" class="z-max z-top">
  <template v-slot:title>
  <p class='card-header-title'>Which store manages your game?</p>
  </template>
  