message: fix(stream-client):fix the stacking issues in stream designer component.
diff: flex: 1;
  display: flex;
  align-items: flex-start;
  - z-index: 0;
  --diagram-secondary: #96a7f8;
  --add-button-width: 48px;
  }
  @@ -43,7 +42,6 @@ flogo-diagram {
  opacity: 0.5;
  width: 18px;
  height: 8px;
  - z-index: -1;
  top: 44%;
  left: -2px;
  }
  @@ -81,7 +79,6 @@ flogo-diagram {
  opacity: 0.5;
  width: 88px;
  height: 8px;
  - z-index: 0;
  top: 42%;
  right: 84px;
  }
  