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/source_switch.js

@@ -31,7 +31,7 @@ export function uiSourceSwitch(context) {
         context.flush();                         // remove stored data
 
         d3_select(this)
-            .text(isLive ? t('source_switch.live') : t('source_switch.dev'))
+            .html(isLive ? t('source_switch.live') : t('source_switch.dev'))
             .classed('live', isLive)
             .classed('chip', isLive);
 
@@ -42,7 +42,7 @@ export function uiSourceSwitch(context) {
         selection
             .append('a')
             .attr('href', '#')
-            .text(t('source_switch.live'))
+            .html(t('source_switch.live'))
             .attr('class', 'live chip')
             .on('click', click);
     };