Add ability to search for servers by host Anvil! node name

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When the user searches, check if the search string is a node name and, if so, show the hosted servers at the top of the list.

Also, the current search doesn't include a space in the tiles matching the search and the unmatched names below.

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Added as a 3.1 feature as I suspect it's an easy ask, but if not this can slip to 3.2.

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Here's an example of the lack of space in the search results.