message: Update page header options on game pages
diff: -->
  <app-page-header
  :cover-media-item="game.header_media_item"
  - :should-affix-nav="$route.name !== 'discover.games.view.download'"
  - :autoscroll-anchor-key="game.id"
  - :show-cover-buttons="shouldShowCoverButtons"
  + should-affix-nav
  :blur-header="!shouldShowFullCover"
  :cover-auto-height="!shouldShowFullCover"
  - :disable-autoscroll-anchor="!Screen.isXs"
  + :autoscroll-anchor-key="game.id"
  + :show-cover-buttons="shouldShowCoverButtons"
  >
  + <!-- :disable-autoscroll-anchor="!Screen.isXs" -->
  <template slot="cover-buttons" v-if="shouldShowCoverButtons">
  <app-game-cover-buttons
  