message: Add guard against missing
diff: @@ -48,11 +48,13 @@ const DropdownButton: TemplateOnlyComponent<Signature> = <template>
  data-test-boxel-dropdown-button
  ...attributes
  >
  + {{#if @icon}}
  {{svgJar
  @icon
  width=(or @iconSize 16)
  height=(or @iconSize 16)
  }}
  + {{/if}}
  </button>
  </:trigger>
  <:content as |dd|>
  