use input type=search for search UI

modules/popup-dialog.php

@@ -138,7 +138,7 @@
 
 			print "<table width='100%'><tr><td>".__('Search:')."</td><td>";
 			
-			print "<input name=\"query\" class=\"iedit\" 
+			print "<input name=\"query\" class=\"iedit\" type=\"search\"
 				onkeypress=\"return filterCR(event, search)\"
 				onchange=\"toggleSubmitNotEmpty(this, 'search_submit_btn')\"
 				onkeyup=\"toggleSubmitNotEmpty(this, 'search_submit_btn')\"

modules/pref-feeds.php

@@ -743,7 +743,7 @@
 		}
 
 		print "<div class=\"feedEditSearch\">
-			<input id=\"feed_search\" size=\"20\"  
+			<input id=\"feed_search\" size=\"20\" type=\"search\"
 				onchange=\"javascript:updateFeedList()\" value=\"$feed_search\">
 			<input type=\"submit\" class=\"button\" 
 				onclick=\"javascript:updateFeedList()\" value=\"".__('Search')."\">

tt-rss.php

@@ -161,7 +161,7 @@ window.onload = init;
 		<?php if (get_pref($link, 'ENABLE_SEARCH_TOOLBAR')) { ?>
 
 		<?php echo __('Search:') ?>
-		<input name="query"
+		<input name="query" type="search"
 			onKeyPress="return filterCR(event, viewCurrentFeed)"
 			onblur="javascript:enableHotkeys();" onfocus="javascript:disableHotkeys();">