Nest the 'flat' formatted tag cloud into some element

[hudatoriq]

When displayed as comma separated format, the clouds don't have any parent block element to assign some stylesheet properties to. When used in a sidebar widget, the tag cloud is on the same level with the widget title.

<li class="widget widget_tag_cloud" id="tag_cloud">
	<h2 class="widgettitle">Tag Cloud</h2>
	<a href="">Tag 1</a> <a href="">Tag 2</a> <a href="">Tag 3</a>
</li>

We can't treat the tag clouds as a block, for example styling their margin, padding etc.

When displayed as a list, we are able to do so, cause the tag list is contained inside <ul></ul>.

Providing a parent element to the 'flat' (comma separated) tag cloud would be the solution, for example:

<li class="widget widget_tag_cloud" id="tag_cloud">
	<h2 class="widgettitle">Tag Cloud</h2>
	<p><a href="">Tag 1</a> <a href="">Tag 2</a> <a href="">Tag 3</a></p>
</li>

I will come up with patches after hearing some opinions.

2.7 is feature freeze, sending to 2.8.

(In [11199]) Wrap tag cloud in a block element, props hudatoriq, fixes #7905

Better in <div> as it's neutral.