bugfix: only bring the analyses to the front, not all the nodes blindly

This means that the purple blobs that represent conditional dataflows are
not put on top of the outgoing connections, and we can finally see which
condition goes to which analysis.

javascript/pipeline_diagram.js

@@ -63,7 +63,10 @@ function draw_diagram(xmlStr) {
     g.node().appendChild(importedNode);
 
     // We move to front all the nodes to avoid being hidden behind other elements
-    d3.selectAll("#pipeline_diagram .node").moveToFront();
+    d3.selectAll("#pipeline_diagram .node").filter(function(d, i) {
+        var t = $(this).children("title");
+        return t.length && $(t[0]).text().startsWith("analysis");
+    }).moveToFront();
 }
 
 // This is creating the pie charts in the pipeline diagram