message: fix: restructure paginated-list layout template
diff: +{{#if this.errorShown}}
  + <p>{{t 'osf-components.paginated-list.error'}}</p>
  +{{else if (or @items.length (and this.loading this.placeholderCount))}}
  <ul class='list-group m-md'>
  {{yield (hash
  header=(component 'paginated-list/x-header')
  )}}
  {{#if this.loading}}
  - {{#if this.placeholderCount}}
  {{#each (range 1 this.placeholderCount)}}
  {{yield (hash
  item=(component 'paginated-list/x-item')
  doReload=(action @doReload)
  )}}
  {{/each}}
  - {{/if}}
  {{else if @items.length}}
  {{#each @items as |item index|}}
  {{#unless item.isDeleted}}
  {{/each}}
  {{/if}}
  </ul>
  -
  -{{#if this.loading}}
  - {{#if (not this.placeholderCount)}}
  - {{loading-indicator dark=true}}
  - {{/if}}
  -{{else if this.errorShown}}
  - <p>{{t 'osf-components.paginated-list.error'}}</p>
  -{{else if (not @items.length)}}
  - {{yield (hash
  - empty=(component 'paginated-list/x-render')
  - doReload=(action @doReload)
  - )}}
  -{{/if}}
  -
  {{#if this.paginatorShown}}
  <div class='text-center'>
  {{simple-paginator
  }}
  </div>
  {{/if}}
  +{{else if this.loading}}
  + {{loading-indicator dark=true}}
  +{{else}}
  + {{yield (hash
  + empty=(component 'paginated-list/x-render')
  + doReload=(action @doReload)
  + )}}
  +{{/if}}
  