DM-8376: added url test launch

Author: robyww

src/firefly/html/demo/ffapi-highlevel-test.html

@@ -31,6 +31,9 @@
     <a href="javascript:firefly.action.dispatchZoom({plotId: 'xxq',userZoomType:'UP' ,dispatcher:window.ffViewer.dispatch})">up</a>
     <a href="javascript:firefly.action.dispatchZoom({plotId: 'xxq',userZoomType:'DOWN' ,dispatcher:window.ffViewer.dispatch})">down</a>
 </div>
+<div>
+    <a href='../../firefly/;a=ImagePlotCntlr.PlotImage?wpRequest={%20%22File%22:%20%22http://ned.ipac.caltech.edu/img/1988MNRAS.230..345N/ARP_220:I:6cm:n1988.fits.gz%22,%20%22URL%22:%20%22http://ned.ipac.caltech.edu/img/1988MNRAS.230..345N/ARP_220:I:6cm:n1988.fits.gz%22,%20%22RangeValues%22:%20%2292,-2,92,8,1,0,1,2,44,25,600,120%22,%20%22PostTitle%22:%20%22ARP%20220%22,%20%22TitleFilenameModePfx%22:%20%22cutout%22,%20%22ColorTable%22:%201,%20%22TitleOptions%22:%20%22FILE_NAME%22,%20%22Type%22:%20%22TRY_FILE_THEN_URL%22%20}'>Show Fits by URL</a>
+</div>
 <div>
     <div id="imageViewHere" style="display: inline-block; width: 550px; height: 550px; margin: 10px;"></div>
     <div id="coverageHere" style="display: inline-block; width: 400px; height: 400px; margin: 10px;"></div>