API FormField->setDescription() visible in default template

Renders into <span class="description"> instead of "title" attribute

docs/en/changelogs/3.1.0.md

@@ -60,10 +60,10 @@ you'll need to adjust your code.
    including `Email_BounceHandler` and `Email_BounceRecord` classes,
    as well as the `Member->Bounced` property. 
  * Deprecated global email methods `htmlEmail()` and `plaintextEmail`, as well as various email helper methods like `encodeMultipart()`. Use the `Email` API, or the `Mailer` class where applicable.
- * Removed non-functional `$inlineImages` option for sending emails
+ * Removed non-functional `$inlineImages` option for sending emails 
  * Removed support for keyed arrays in `SelectionGroup`, use new `SelectionGroup_Item` object
    to populate the list instead (see [API docs](api:SelectionGroup)).
- * Removed `Form->Name()`: Use getName()
+ * `FormField->setDescription()` now renders in a `<span class="description">` by default, rather than a `title` attribute * Removed `Form->Name()`: Use getName()
  * Removed `FormField->setContainerFieldSet()`: Use setContainerFieldList()
  * Removed `FormField->rootFieldSet()`: Use rootFieldList()
  * Removed `Group::map()`: Use DataList::("Group")->map()

forms/FormField.php

@@ -356,7 +356,6 @@ class FormField extends RequestHandler {
 			'class' => $this->extraClass(),
 			'id' => $this->ID(),
 			'disabled' => $this->isDisabled(),
-			'title' => $this->getDescription(),
 		);
 		
 		return array_merge($attrs, $this->attributes);

templates/forms/CheckboxSetField.ss

@@ -1,4 +1,4 @@
-<ul id="$ID" class="$extraClass"<% if Description %> title="$Description"<% end_if %>>
+<ul id="$ID" class="$extraClass">
 	<% if Options.Count %>
 		<% loop Options %>
 			<li class="$Class">

templates/forms/FormField.ss

@@ -1,7 +1,5 @@
 <% if isReadonly %>
-	<span id="$ID"
-	      <% if extraClass %>class="$extraClass"<% end_if %>
-	      <% if $Description %>title="$Description"<% end_if %>>
+	<span id="$ID"<% if extraClass %> class="$extraClass"<% end_if %>>
 		$Value
 	</span>
 <% else %>

templates/forms/FormField_holder.ss

@@ -5,4 +5,5 @@
 	</div>
 	<% if RightTitle %><label class="right" for="$ID">$RightTitle</label><% end_if %>
 	<% if Message %><span class="message $MessageType">$Message</span><% end_if %>
+	<% if Description %><span class="description">$Description</span><% end_if %>
 </div>

templates/forms/OptionsetField.ss

@@ -1,4 +1,4 @@
-<ul id="$ID" class="$extraClass"<% if Description %> title="$Description"<% end_if %>>
+<ul id="$ID" class="$extraClass">
 	<% loop Options %>
 		<li class="$Class">
 			<input id="$ID" class="radio" name="$Name" type="radio" value="$Value"<% if isChecked %> checked<% end_if %><% if isDisabled %> disabled<% end_if %> />