New filter feature + page number fix

-Added searchbar for filtering titles
-Added clear filters button at the bottom of the sidebar

-Fixed page number buttons (some didn't link to anything)
-Improvements to search speeds
-Changed colour scheme of page buttons

*Payment system works but:
+Needs checks so you cant enter anything
+changeMembershipStatus.php needs fixed to accept different values
+Currently sends a request to make status=1