Prepared partial move to TypeScript

src/Data/SettingClasses/SettingColours.ts

@@ -0,0 +1,11 @@
+import Setting from './BaseSetting';
+
+/** The colour picker setting class */
+export default class SettingColours extends Setting {
+  desc: string;
+
+  constructor(type: string, group: string, desc: string) {
+    super(type, group);
+    this.desc = desc;
+  }
+}