Update MKB codes

src/types/preferences.d.ts

@@ -0,0 +1,18 @@
+export type PreferenceSetting = {
+    default: any;
+    options?: {[index: string]: string};
+    multiple_options?: {[index: string]: string};
+    unsupported?: string | boolean;
+    note?: string | HTMLElement;
+    type?: SettingElementType;
+    ready?: () => void;
+    migrate?: (savedPrefs: any, value: any) => {};
+    min?: number;
+    max?: number;
+    steps?: number;
+    experimental?: boolean;
+    params?: any;
+    label?: string;
+};
+
+export type PreferenceSettings = {[index in PrefKey]: PreferenceSetting};