style cleanup for navigation buttons

Author: Rajesh Segu

src/styles/brackets.less

@@ -886,15 +886,10 @@ a, img {
     }
 }
 
-.modal-bar .navigator {
-    display: none;
-    display: inline-block;
-    
-    button {
-        padding:5px 15px;
-        border:1px #999 solid;
-        border-radius:3px;
-        margin:2px 2px 5px;   
+.modal-bar .navigator {    
+    display: none;        
+    button {    
+        margin: 2px 1px 3px;   
     }
 }