Add markdown utils

- External links open in a new tab
- Clicking on image open an image modal

resources/base.scss

@@ -923,4 +923,9 @@ input::placeholder{
         font-size: 22.5px;
         margin-right: 0.1em;
     }
+}
+
+.featherlight-content {
+    max-height: 80% !important;
+    border-radius: 10px;
 }

resources/common.js

@@ -475,7 +475,11 @@ function onWindowReady() {
     
     $('a').click(function() {
         var href = $(this).attr('href');
-        if (!href || href === '#' || href.startsWith("javascript")) {
+        var target = $(this).attr('target');
+        if (!href || href === '#' || href.startsWith("javascript") || 
+            $(this).attr("data-featherlight") ||
+            target === "_blank"
+        ) {
             return;
         }