Switch to side-by-side view

--- a/dirbrowser/dark.css
+++ b/dirbrowser/dark.css
@@ -4,6 +4,13 @@
     background-color: #3c3c3c;
     color: #D8D8D8;
     selection-background-color: #424e72;
+}
+
+div#fixedheader {
+    background-color: #3c3c3c;
+}
+div#browsepath {
+    background-color: #3c3c3c;
 }
 
 a:link {