Download arrow points up, not down

[jonathancrabtree]

A minor issue raised by @victor73 for possible discussion: the arrow on our Download buttons points up (and to the right) not down, as one might perhaps expect:

It's possible that it used to be an "Export" button rather than a "Download" button, which would explain the arrow direction, and the code suggests this might be the case:

                    <div class="col-md-4" id="sbc1-download-button-container">
                      <p id="sbc1-export" class="export-button"><a href="javascript: export_chart_data('sbc1')"><img src='images/download_button.png' style='width: 125px; height: 32px;' title='Export chart'></a></p>
                    </div>

In particular, note that the title/hovertext is "Export chart":