message: Make image-editor template more readable
diff: +{{#let (get content field "base64") as |hasImage|}}
  <div class="cardstack-image-editor">
  - {{#if (get content field "base64")}}
  + {{#if hasImage}}
  <div class="cardstack-image-editor-filename">
  Selected image: {{get (get content field) 'imageFileName'}}
  </div>
  cardstack-image-editor-button--choose"
  {{action (perform chooseImage)}}
  disabled={{disabled}}>
  - Choose {{#if (get content field 'base64')}}Another{{/if}} Image
  + Choose {{#if hasImage}}Another{{/if}} Image
  </button>
  - {{#if (get content field "base64")}}
  + {{#if hasImage}}
  <button class="cardstack-image-editor-button
  cardstack-image-editor-button--remove"
  {{action "removeImage"}} disabled={{disabled}}>
  </button>
  {{/if}}
  </div>
  +{{/let}}
  \ No newline at end of file
  