message: Update ui to 0.15.0
diff: "request": "^2.83.0",
  "request-promise": "^4.2.2",
  "simple-git": "~1.92.0",
  - "vscode-azureextensionui": "~0.13.0",
  + "vscode-azureextensionui": "~0.15.0",
  "vscode-azurekudu": "~0.1.8",
  "vscode-extension-telemetry": "^0.0.15",
  "vscode-nls": "^2.0.2",
  "vscode": "^1.1.5"
  },
  "engines": {
  - "vscode": "^1.20.0"
  + "vscode": "^1.23.0"
  }
  }
  