Move exact search matches to top of dropdown

[kylanhurt]

Fixes #816

Description

For accounts, exact matches are prioritized at the top of the search results.

Test scenarios

1. Search eosio
2. See if it shows up above eosio.null and eosio.evm, etc

Checklist:

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View logs

[donnyquixotic]

.

[donnyquixotic]

@kylanhurt #816 only affects system accounts that are manually added to the search results when the search term matches as they are not included in the table query. All other search results are already alphabetically sorted with the exact match on top. This is more easily resolved by just prepending (unshift()) instead of pushing the system accounts.
See fix here: df2e7f2