MDL-57124 boost: Show pageheaderbutton when no navbar

Even if there is no navbar - if there is a pageheaderbutton we need to
show it (E.g. Customise this page on dashboard).

theme/boost/classes/output/core_renderer.php

@@ -81,11 +81,14 @@ class core_renderer extends \core_renderer {
         $html .= html_writer::start_div('card-block');
         $html .= html_writer::div($this->context_header_settings_menu(), 'pull-xs-right context-header-settings-menu');
         $html .= $this->context_header();
+        $pageheadingbutton = $this->page_heading_button();
         if (empty($PAGE->layout_options['nonavbar'])) {
             $html .= html_writer::start_div('clearfix', array('id' => 'page-navbar'));
             $html .= html_writer::tag('div', $this->navbar(), array('class' => 'breadcrumb-nav'));
-            $html .= html_writer::div($this->page_heading_button(), 'breadcrumb-button');
+            $html .= html_writer::div($pageheadingbutton, 'breadcrumb-button');
             $html .= html_writer::end_div();
+        } else if ($pageheadingbutton) {
+            $html .= html_writer::div($pageheadingbutton, 'breadcrumb-button nonavbar');
         }
         $html .= html_writer::tag('div', $this->course_header(), array('id' => 'course-header'));
         $html .= html_writer::end_div();

theme/boost/scss/moodle/modules.scss

@@ -183,6 +183,9 @@ select {
 .breadcrumb-button {
     float: right;
     margin-top: 4px;
+    &.nonavbar {
+        margin-top: -3rem;
+    }
 }
 
 .breadcrumb-button .singlebutton {