further improvements

css/stylesheet.css

@@ -271,7 +271,6 @@ section {
 
 .files_bar {
     height: 30px;
-    border: none;
     border-bottom: 1px solid #505050;
 }
 

public/algorithm_visualizer.css

@@ -391,7 +391,6 @@ section {
 
 .files_bar {
     height: 30px;
-    border: none;
     border-bottom: 1px solid #505050;
 }
 

public/algorithm_visualizer.min.css

@@ -13,4 +13,4 @@
  * "Fork me on GitHub" CSS ribbon v0.2.0 | MIT License
  * https://github.com/simonwhitaker/github-fork-ribbon-css
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