Switch to side-by-side view

--- a/GUI/dark.qss
+++ b/GUI/dark.qss
@@ -646,3 +646,11 @@
     width: 8px;
     margin: 0.5px;
 }
+
+/* This seems to be useful on win10 where it the default makes the search
+ match text barely visible (just changes the background to a pale grey,
+ almost invisible either against the white or grey backgrounds). */
+QWebView { 
+    selection-background-color: white;
+    selection-color: blue;
+}