tslint settings not imported

I've got the following tslint.json file:

{
  "extends": [
    "tslint-config-airbnb"
  ],
  "rules": {
    "mocha-no-side-effect-code": false,
    "missing-jsdoc": false,
    "no-relative-imports": false,
    "export-name": false,
    "promise-function-async": false,
    "no-void-expression": false,
    "max-line-length": false,
    "no-redundant-jsdoc": false,
    "prefer-type-cast": false,
    "align": false,
    "import-name": false,
    "trailing-comma": [
      true,
      {
        "multiline": "never",
        "singleline": "never"
      }
    ],
    "typedef": [
      true,
      "parameter",
      "arrow-parameter",
      "property-declaration",
      "member-variable-declaration"
    ],
    "semicolon": false
  }
}

I've tried importing them by right-clicking the file and selecting "Apply TSLint Code Style Rules", but this doesn't seem to have effect. Reformatting the code uses e.g. 4-space indentation instead of 2 - and immediately after gives errors that tslint rules are not followed, and there's also a lot of warnings, e.g. missing semicolons (while semicolons are turned off).

How to properly import tslint settings into webstorm?