make Title matching default for filters, change description for filter "both"

backend.php

@@ -648,7 +648,7 @@
 		print "<table class=\"prefAddFeed\"><tr>
 			<td><input id=\"fadd_regexp\"></td>
 			<td>";
-			print_select("fadd_match", "", $filter_types);	
+			print_select("fadd_match", "Title", $filter_types);	
 	
 		print"</td><td colspan=\"4\" align=\"right\">
 				<a class=\"button\" href=\"javascript:addFilter()\">Add filter</a></td></tr>

ttrss_schema.sql

@@ -52,7 +52,7 @@ create table ttrss_filter_types (id integer primary key,
 insert into ttrss_filter_types (id,name,description) values (1, 'title', 'Title');
 insert into ttrss_filter_types (id,name,description) values (2, 'content', 'Content');
 insert into ttrss_filter_types (id,name,description) values (3, 'both', 
-	'Title and Content');
+	'Title or Content');
 
 create table ttrss_filters (id serial primary key, 
 	filter_type integer not null references ttrss_filter_types(id),