MDL-40975 Theme: Standardise size of icons in headings

lib/outputrenderers.php

@@ -2064,7 +2064,7 @@ class core_renderer extends renderer_base {
     public function heading_with_help($text, $helpidentifier, $component = 'moodle', $icon = '', $iconalt = '', $level = 2, $classnames = null) {
         $image = '';
         if ($icon) {
-            $image = $this->pix_icon($icon, $iconalt, $component, array('class'=>'icon'));
+            $image = $this->pix_icon($icon, $iconalt, $component, array('class'=>'icon iconlarge'));
         }
 
         $help = '';

theme/base/style/core.css

@@ -149,7 +149,10 @@ h4 img.iconhelp,
 h5 img.icon,
 h5 img.iconhelp,
 h6 img.icon,
-h6 img.iconhelp {vertical-align: middle;}
+h6 img.iconhelp {
+    vertical-align: middle;
+    padding: 4px;
+}
 
 /** The 1-pixel padding is there to avoid phantom scroll bars on OS X (FF, Safari and Chrome)**/
 .no-overflow {overflow:auto;padding-bottom:1px;}

theme/bootstrapbase/less/moodle/core.less

@@ -225,6 +225,7 @@ h4 img.iconhelp, h4 img.icon,
 h5 img.iconhelp, h5 img.icon,
 h6 img.iconhelp, h6 img.icon {
   vertical-align: middle;
+  padding: 4px;
 }
 .dir-rtl img.iconhelp, .dir-rtl .helplink img {
     padding-right: 3px;