Make t function return a span element with a lang attribute unless html: false is specified in the options (re: #7963)

Update `text` functions to `html` to support inserting the `span` elements
Specify `html: false` for various instances where a `span` is not desired, e.g. `placeholder` and `title` attributes

modules/ui/data_header.js

@@ -32,7 +32,7 @@ export function uiDataHeader() {
         headerEnter
             .append('div')
             .attr('class', 'data-header-label')
-            .text(t('map_data.layers.custom.title'));
+            .html(t('map_data.layers.custom.title'));
     }