fix(tests): only override left clicks in index custom script

tests/ui_tests/reporting/testreport.js

@@ -88,8 +88,8 @@ function findNextForHref(doc, href) {
 
 
 function openLink(ev) {
-    if (ev.button === 2) {
-        // let right click through
+    if (ev.button !== 0 || ev.ctrlKey || ev.metaKey || ev.shiftKey || ev.altKey) {
+        // let everything but unmodified left clicks through
         return true;
     }