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/note_header.js

@@ -41,7 +41,7 @@ export function uiNoteHeader() {
         headerEnter
             .append('div')
             .attr('class', 'note-header-label')
-            .text(function(d) {
+            .html(function(d) {
                 if (_note.isNew()) { return t('note.new'); }
                 return t('note.note') + ' ' + d.id + ' ' +
                     (d.status === 'closed' ? t('note.closed') : '');