Attempt to fix test intermittent failures (#112)

* Attempt to fix test intermittent failures

Author: bbimber

jbrowse/package-lock.json

@@ -225,11 +225,13 @@ private By getVariantWithinTrack(String trackId, String variantText, boolean wai
                 waitForElement(l);
             }
 
-            // Not ideal, but this might fix intermittent failures due to loading
-            sleep(100);
+            waitForElementToDisappear(Locator.tagWithText("p", "Loading"));
+            sleep(250);
 
             return By.xpath(l.toXpath());
-        } catch(Exception e) {
+        }
+        catch(Exception e)
+        {
             return null;
         }
     }