CRM-13929 - Centralize and simplify radio clear widget

CRM/Core/Form/Renderer.php

css/civicrm.css

js/Common.js

templates/CRM/Activity/Form/Search.tpl

templates/CRM/Activity/Form/Search/Common.tpl

templates/CRM/Admin/Form/ScheduleReminders.tpl

templates/CRM/Badge/Form/Layout.js

templates/CRM/Badge/Form/Layout.tpl

templates/CRM/Campaign/Form/Petition/Block.tpl

templates/CRM/Contact/Form/Edit/Address/CustomField.tpl

templates/CRM/Contact/Form/Edit/Demographics.tpl

templates/CRM/Contact/Form/Inline/Demographics.tpl

templates/CRM/Contact/Form/Search/Criteria/Basic.tpl

templates/CRM/Contact/Form/Search/Criteria/ChangeLog.tpl

templates/CRM/Contact/Form/Search/Criteria/Demographics.tpl

templates/CRM/Contribute/Form/AdditionalInfo/Honoree.tpl

templates/CRM/Contribute/Form/ContributionPage/Amount.tpl

templates/CRM/Contribute/Form/Search/Common.tpl

templates/CRM/Contribute/Form/SoftCredit.tpl

templates/CRM/Contribute/Form/Task/PDFLetter.tpl