JToolbarHelper::title allow to add HTML markup for toolbar, however it also add the HTML for browser title.
This pull fix it.
test
into Isis template file index.php add next: JToolbarHelper::title('<b>Test</b>');
and check the browser title actual result Site Name - Administration - <b>Test</b> expected Site Name - Administration - Test
hm, or maybe better do it globally in
JDocumentRendererHead::fetchHead
?