FIX: Safari needs a max-width to prevent modal overflow

app/assets/stylesheets/common/base/history.scss

@@ -19,6 +19,8 @@
   .revision-content {
     width: 47.5%;
     float: left;
+    max-width: 500px; // Safari needs a max-width to prevent overflow issues
+
     &:nth-of-type(2) {
       margin-left: 5%;
     }