minor JS and UI fix

public/css/gogs.css

@@ -2318,6 +2318,7 @@ footer .container .links > *:first-child {
 }
 .repository .diff-file-box .code-diff pre {
   margin: 0;
+  font-size: 13px;
 }
 .repository .diff-file-box .code-diff .lines-num {
   border-right: 1px solid #d4d4d5;

public/js/gogs.js

@@ -938,7 +938,7 @@ $(window).load(function () {
     }
 
     // Code view.
-    if ($('.code-view').length > 0) {
+    if ($('.code-view .linenums').length > 0) {
         var $block = $('.code-view .linenums');
         var lines = $block.html().split("\n");
         $block.html('');

public/less/_repository.less

@@ -676,12 +676,14 @@
     }
     .code-diff {
     	font-size: 13px;
+    	
     	td {
     		padding: 0;
     		border-top: none;
     	}
     	pre {
     		margin: 0;
+	    	font-size: 13px;
     	}
     	.lines-num {
     		border-right: 1px solid #d4d4d5;