cleanup templates:

- move out shared functions to shared templates
  - remove useless classes
  - simplify
  - various cleanups & enhancements

layouts/cantorfora/single.html

@@ -2,13 +2,9 @@
 
 <section class="section">
   <div class="container">
-    <div class="row">
-      <div class="col-12 mb-4">
-        <img src="{{ .Params.Image | relURL }}" class="img-fluid w-100">
-      </div>
-      <div class="col-12 content">
-        {{ .Content }}
-      </div>
+    <img src="{{ .Params.Image | relURL }}" class="img-fluid w-100 mb-4">
+    <div class="content text-justify">
+      {{ .Content }}
     </div>
   </div>
 </section>