fix(save-search): correct total calculation for itemtype

[MyvTsv]

• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.

Description

• It fixes !35211
• Fix the counter in saved searches. Previously, the counter displayed the total number of all item types instead of reflecting the actual results of the search. With this fix, the counter now correctly represents the search results based on the specified criteria.

Screenshots (if appropriate):

[cedric-anne]

I am not sure this fix is correct. The prepareQueryToUse() method is able to handle search criteria that no longer match a valid search option, for instance a search option related to an itemtype of a plugin that is no longer active. See usage of the $enable_partial_warnings method parameter.

[cedric-anne]

I do not know if this fix is correct, but it should probably set the $usesession parameter to false.

Suggested change

	$params = $search::manageParams($this->getField('itemtype'), $_GET);
	$params = $search::manageParams($this->getField('itemtype'), $_GET, false);