bugfix: prevent requestNavigation when click on nested link #724

Closes #724 (closed)

Test case:

    <solid-router>
      <solid-route use-id name="user"></solid-route>
    </solid-router>

    <solid-display
      data-src="data/list/users.jsonld"
      fields="username, email"
      widget-email="c-w"
      next="user"
    ></solid-display>

    <solid-widget name="c-w">
      <template>
        <a href="https://startinblox.com" target="_blank">link</a>
      </template>
    </solid-widget>

    <div data-view="user">
      <solid-display
        bind-resources
        fields="first_name, last_name"
      ></solid-display>
    </div>

When clicking on link, it should not activate the user view