Fixed issue when dragging a issue to the bottom when count element is visible

app/assets/javascripts/boards/components/board_list.js.es6

@@ -107,8 +107,12 @@ import boardCard from './board_card';
           });
         },
         onUpdate: (e) => {
-          gl.issueBoards.BoardsStore.moveIssueInList(this.list, Store.moving.issue, e.oldIndex, e.newIndex, this.sortable.toArray());
+          const sortedArray = this.sortable.toArray().filter(id => id !== '-1');
+          gl.issueBoards.BoardsStore.moveIssueInList(this.list, Store.moving.issue, e.oldIndex, e.newIndex, sortedArray);
         },
+        onMove(e) {
+          return !e.related.classList.contains('board-list-count');
+        }
       });
 
       this.sortable = Sortable.create(this.$refs.list, options);

app/views/projects/boards/components/_board_list.html.haml

@@ -17,7 +17,8 @@
       ":root-path" => "rootPath",
       ":disabled" => "disabled",
       ":key" => "issue.id" }
-    %li.board-list-count.text-center{ "v-if" => "showCount" }
+    %li.board-list-count.text-center{ "v-if" => "showCount",
+      "data-issue-id" => "-1" }
       = icon("spinner spin", "v-show" => "list.loadingMore" )
       %span{ "v-if" => "list.issues.length === list.issuesSize" }
         Showing all issues