x;
                                              max-height: 6px" data-expected-width="10" data-expected-height="6">
    </div>
    <div class="flexbox">
      <img src="support/solidblue.png" style="max-width: 6px;
                                              max-height: 10px" data-expected-width="6" data-expected-height="6">
    </div>
    <br>

    <!-- Row 5: min main-size vs. max cross-size, & vice versa -->
    <div class="flexbox">
      <img src="support/solidblue.png" style="min-width: 30px;
     