[html] don't show closing element proposal as first entry if element is already closed later

[isidorn]

Have the following html content

<header>
	<
</header>

Let the cursor be on the second line, as soon as you type < suggest widget shows and /header is the first suggestion.
I would not expect /header to be offered here since that tag is already closed.

fyi @keford

[aeschli]

I see your point.

• it's just a proposal. It's up to the user to decide whether it makes sense to pick that proposal.
• closing an element that is closed later makes more sense when doing it for common elements like <span> and <div>
• the completion list is not super useful when just typing <. It contains all elements. Only when typing the next characters the list filters down to better proposals.

+1 for sorting it lower if we find out that the element is already closed later in the file. We currently don't look after the current completion position.