Bug 31528: (follow-up) A few additional rules

Adding a few more rules which came up during the correction process in
the follow-up bug.

Signed-off-by: David Nind <david@davidnind.com>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

.stylelintrc.json

@@ -5,9 +5,11 @@
   ],
   "rules": {
       "alpha-value-notation": null,
+      "color-function-notation": "legacy",
       "color-hex-case": "upper",
       "color-hex-length": null,
       "color-named": "never",
+      "declaration-colon-newline-after": null,
       "declaration-colon-space-after": "always",
       "declaration-no-important": true,
       "function-parentheses-space-inside": "always",
@@ -17,8 +19,11 @@
       "media-feature-parentheses-space-inside": "always",
       "no-descending-specificity": null,
       "no-duplicate-selectors": true,
+      "no-invalid-position-at-import-rule": null,
       "number-leading-zero": "never",
       "order/properties-alphabetical-order": true,
+      "scss/dollar-variable-pattern": null,
+      "scss/no-global-function-names": null,
       "selector-class-pattern": null,
       "selector-id-pattern": null,
       "selector-no-qualifying-type": null,