Show pasted images in the form instead of a text with their count

boards/static/css/base.css

@@ -196,3 +196,8 audio {
     width: 200px;
 }
 
+.image-preview {
+    max-width: 200px;
+    max-height: 150px;
+    margin: 5px;
+}
  No newline at end of file

boards/static/js/form.js

@@ -110,7 +110,13 function addOnImagePaste() {
                     $('#id_file_1').parent().append(pastedImagesList);
                 }
 
-                pastedImagesList.text(gettext('Images posted: ') + pastedImages.length);
+                var fr = new FileReader();
+                fr.onload = function () {
+                    var img = $('<img class="image-preview" />');
+                    img.attr('src', fr.result);
+                    pastedImagesList.append(img);
+                };
+                fr.readAsDataURL(blob);
             }
         }
     });