Merge pull request #362 from TykTechnologies/TUI-45/stylelint

adds stylelint and fixes css lint errors

.stylelintrc.js

@@ -0,0 +1,27 @@
+module.exports = {
+  extends: 'stylelint-config-standard-scss',
+  plugins: [
+    'stylelint-use-logical-spec',
+    'stylelint-declaration-block-no-ignored-properties'
+  ],
+  ignoreFiles: [
+    'src/common/sass/fontawesome.scss',
+    'src/common/sass/tykon.scss'
+  ],
+  rules: {
+    'color-hex-length': null,
+    'custom-property-empty-line-before': null,
+    'declaration-block-no-redundant-longhand-properties': null,
+    'liberty/use-logical-spec': true,
+    'no-descending-specificity': null,
+    'plugin/declaration-block-no-ignored-properties': true,
+    'property-no-vendor-prefix': [true, { ignoreProperties: ['full-screen', 'mask', 'mask-size', 'user-select'] }],
+    'scss/at-extend-no-missing-placeholder': null,
+    'scss/at-import-partial-extension': null,
+    'scss/dollar-variable-empty-line-before': null,
+    'scss/double-slash-comment-empty-line-before': null,
+    'scss/percent-placeholder-pattern': null,
+    'selector-class-pattern': null,
+    'selector-no-vendor-prefix': [true, { ignoreSelectors: [':-webkit-full-screen', ':-ms-input-placeholder'] }],
+  }
+};