all: sync with master; upd chlog

client/src/helpers/helpers.js

@@ -670,6 +670,15 @@ export const setHtmlLangAttr = (language) => {
     window.document.documentElement.lang = language;
 };
 
+/**
+ * Sets UI theme.
+ *
+ * @param theme
+ */
+export const setUITheme = (theme) => {
+    document.body.dataset.theme = theme;
+};
+
 /**
  * @param values {object}
  * @returns {object}