Fix: prevent staff members from deleting projects published by other staff members.

As per title

app/templates/pages/staff/projects.html

@@ -18,8 +18,10 @@
                                         <a href="{{ url_for("staff.view_project", project_id=project.id) }}"
                                            class="w3-button w3-hover-teal">View</a>
                                     {% endif %}
+                                    {% if allow_edit %}
                                     <a href="{{ url_for("staff.delete_project", project_id=project.id) }}"
                                        class="w3-button w3-hover-red">Delete</a>
+                                    {% endif %}
                                 </div>
                             </li>
                         {% endfor %}