message: fix helper text and show example lacement
diff: ...attributes
  >
  {{@schemaBlock.displayText}}
  -</label>
  {{#if this.isEditableForm}}
  <Registries::SchemaBlockRenderer::HelperTextIcon @helpText={{this.schemaBlock.helpText}} />
  -
  {{#if this.schemaBlock.exampleText}}
  <OsfButton @type='link' @onClick={{action this.toggleShouldShowExample}}>
  {{t 'osf-components.registries.schema-block-renderer/label.showExample'}}
  </OsfButton>
  {{/if}}
  -
  + {{/if}}
  +</label>
  +{{#if this.isEditableForm}}
  {{#if (and this.shouldShowExample this.schemaBlock.exampleText)}}
  <p>
  {{this.schemaBlock.exampleText}}
  