[ticket/10737] Add live member search. * prototech/ticket/10737: [ticket/10737] Remove loading indicator. [ticket/10737] Enforce allow_live_searches setting in memberlist.php. [ticket/10737] Add config setting to disable live searches. [ticket/10737] Add loading indicator and alert box code to simple_footer.html. [ticket/10737] Load core.js and ajax.js in simple_footer.html. [ticket/10737] Set the username as the input value instead of redirecting. [ticket/10737] Drop subsilver2 changes. [ticket/10737] Add a more generic live search implementation. [ticket/10737] Clean up memberlist.php. [ticket/10737] Use dropdown for search results container. [ticket/10737] Adding delayed keyup and removing target_blank. [ticket/10737] Using UTF-8 aware alternatives in PHP code. [ticket/10737] Removing obsolete code. [ticket/10737] Avoid hard-coding table row and use case-insensitive search. [ticket/10737] Removing unnecessary/obsolete code. [ticket/10737] Using JQuery events and JSON response. [ticket/10737] Code fixes in AJAX search feature [ticket/10737] Improvements over last commit [ticket/10737] Adding username suggestions in "Find a member" using AJAX