Update use of CRM_Utils_System::setTitle() for legacycustomsearches

...earches/CRM/Contact/Form/Search/Custom/ActivitySearch.php

...acycustomsearches/CRM/Contact/Form/Search/Custom/Base.php

...msearches/CRM/Contact/Form/Search/Custom/ContribSYBNT.php

.../CRM/Contact/Form/Search/Custom/ContributionAggregate.php

...stomsearches/CRM/Contact/Form/Search/Custom/DateAdded.php

...earches/CRM/Contact/Form/Search/Custom/EventAggregate.php

...ustomsearches/CRM/Contact/Form/Search/Custom/FullText.php

...cycustomsearches/CRM/Contact/Form/Search/Custom/Group.php

...ustomsearches/CRM/Contact/Form/Search/Custom/PriceSet.php

...stomsearches/CRM/Contact/Form/Search/Custom/Proximity.php

...searches/CRM/Contact/Form/Search/Custom/RandomSegment.php

...ycustomsearches/CRM/Contact/Form/Search/Custom/Sample.php

...rches/CRM/Contact/Form/Search/Custom/TagContributions.php

...msearches/CRM/Contact/Form/Search/Custom/ZipCodeRange.php