Added new image size information (1760x990) to HowToApplicationExamples documentation. Fixes #3901

        <h5>What sizes should my images be?</h5>

        <p>

          Images should fit comfortably on a monitor set to 800x600 resolution. Thumbnails are used as clickable icons

          Images should fit comfortably on a monitor set to 1920x1080 resolution. Thumbnails are used as clickable icons

          that represent the larger image. Thumbnails should be small enough

          to load on a web page quickly and take up minimal space on a web page, yet be large enough to give your

          audience a sense of what they will see if they choose to view the full sized image.

        </p>

        <ul>

          <li><b>Images:</b> no larger than 750 pixels wide and 550 pixels tall</li>

          <li><b>Images:</b> no larger than 1760 pixels wide and 990 pixels tall</li>

          <li><b>Thumbnails:</b> no larger than 200 pixels wide or high, and no more than 32 KB file size</li>

        </ul>