Allow to associate tags to colors

The color is then used as background in the board, list and task details
views

app/Controller/TaskViewController.php

@@ -74,7 +74,7 @@ class TaskViewController extends BaseController
             'internal_links' => $this->taskLinkModel->getAllGroupedByLabel($task['id']),
             'external_links' => $this->taskExternalLinkModel->getAll($task['id']),
             'link_label_list' => $this->linkModel->getList(0, false),
-            'tags' => $this->taskTagModel->getList($task['id']),
+            'tags' => $this->taskTagModel->getTagsByTask($task['id']),
         )));
     }