message: Fix manifest label layout and change buttons color
diff: @@ -326,7 +326,7 @@ export default function IssueForm({ provider, roles, signedInAddress, limitedMod
  <Form.Control type="text" placeholder="Type" onChange={onTypeChange} />
  </Col>
  <Col>
  - <Button onClick={addField}><BsPlus /></Button>
  + <Button variant="secondary" onClick={addField}><BsPlus /></Button>
  </Col>
  </Row>
  </Col>
  @@ -349,10 +349,10 @@ export default function IssueForm({ provider, roles, signedInAddress, limitedMod
  />
  </Col>
  <div>
  - <Button onClick={addField}><BsPlus /></Button>
  + <Button variant="secondary" onClick={addField}><BsPlus /></Button>
  </div>
  <Col>
  - <Button onClick={() => removeField(key)}><BsTrash /></Button>
  + <Button variant="secondary" onClick={() => removeField(key)}><BsTrash /></Button>
  </Col>
  </Row>
  )}
  @@ -361,8 +361,8 @@ export default function IssueForm({ provider, roles, signedInAddress, limitedMod
  </Form.Group>
  <Form.Group>
  <Form.Group>
  - <Form.Label class="form-label col-sm-2">Manifest</Form.Label>
  - <Button onClick={addFieldManifest}><BsPlus /></Button>
  + <Form.Label>Manifest</Form.Label>
  + <Button className="label-button" variant="secondary" onClick={addFieldManifest}><BsPlus /></Button>
  </Form.Group>
  <Form.Group>
  {manifest.map((field, key) =>
  @@ -382,10 +382,10 @@ export default function IssueForm({ provider, roles, signedInAddress, limitedMod
  />
  </Col>
  <div>
  - <Button onClick={addFieldManifest}><BsPlus /></Button>
  + <Button variant="secondary" onClick={addFieldManifest}><BsPlus /></Button>
  </div>
  <Col>
  - <Button onClick={() => removeFieldManifest(key)}><BsTrash /></Button>
  + <Button variant="secondary" onClick={() => removeFieldManifest(key)}><BsTrash /></Button>
  </Col>
  </Row>
  )}
  