improve settings ui (again)

.stylelintrc.json

@@ -1,6 +1,12 @@
 {
     "extends": "stylelint-config-standard",
     "rules": {
-        "indentation": 4
+        "indentation": 4,
+        "selector-class-pattern": [
+            "^[a-z][a-zA-Z0-9]*(-[a-z0-9][a-zA-Z0-9]*)*$",
+            {
+                "message": "Expected class selector to be kebab-case with camelCase segments"
+            }
+        ]
     }
 }