styling: fixing alignment of comment toggle button

rhodecode/public/css/code-block.less

@@ -255,7 +255,7 b' table.code-difftable {'
 
     /** LINE NUMBERS **/
     .lineno {
-        padding-left: 2px;
+        padding-left: 2px !important;
         padding-right: 2px;
         text-align: right;
         width: 32px;

rhodecode/public/css/diff.less

@@ -32,10 +32,14 b' div.diffblock.margined.comm tr {'
     }
 
     .comment-toggle {
-        width: 20px;
+        position: relative;
         color: @rcblue;
-        .icon-comment{
-            display: inline-block;
+
+        .icon-comment {
+            position: absolute;
+            top: 2px;
+            left: 0;
+            z-index: 100;
             visibility: hidden;
         }