First round at refactoring Search.controller.php

Signed-off-by: emanuele <emanuele45@gmail.com>
Fix issues reported by scrutinizer

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Couple of stupid bugs

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Errors

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Search class docs

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Unused search function

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Try to simplify a tiny bit logic

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SearchAPI stored in a private var into search.class

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Some more splitting of Search_Class methods

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Broken function _searchAPI to prepareWord

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Random tweaks and extracted another function from search controller

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Aggregate all the queris to insert data into log_search_results into a function

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Talk about minutes and write seconds is not easy to understand

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