<tr>
  <td>{{input value=model.title}}</td>
  <td>
    {{chosen content=availableTaskRoles
             name="roles"
             width="150px"
             class="collaborator-select"
             prompt="No Role Assigned"
             optionValuePath="content.name"
             optionLabelPath="content.name"
             value=role}}
  </td>
  <td>{{kind}}</td>
  <td class="actions-cell">
    <span class="animation-fade-in">
      {{#if isDirty}}
        <button class="button-link button--blue" {{action "cancel" bubbles=false}}>cancel</button>
        <button class="button-primary button--blue" {{action "save" bubbles=false}}>Save</button>
      {{/if}}
    </span>
  </td>
</tr>

<tr>
  <td>{{model.title}}</td>
  <td>
    {{chosen content=availableTaskRoles
             name="roles"
             width="150px"
             class="collaborator-select"
             prompt="No Role Assigned"
             optionValuePath="content.name"
             optionLabelPath="content.name"
             value=role}}
  </td>
  <td>{{kind}}</td>
  <td class="actions-cell">
    <span class="animation-fade-in">
      {{#if isDirty}}
        <button class="button-link button--blue" {{action "cancel" bubbles=false}}>cancel</button>
        <button class="button-primary button--blue" {{action "save" bubbles=false}}>Save</button>
      {{/if}}
    </span>
  </td>
</tr>

Make task type title read-only
Make task type title read-only