Update table header tooltips

sites/+components/tbl-communities.php

@@ -17,12 +17,11 @@
 			return $id != "qr_code" && $id != "preview" && $id != "join_url";
 		}
 
-		function sort_onclick($colno) {
-			global $TABLE_COLUMNS;
-			$column = $TABLE_COLUMNS[$colno];
+		function sort_onclick($column) {
 			$name = isset($column['name_long']) ? $column['name_long'] : $column['name'];
-			if (!column_sortable($column['id'])) return " title='$name'";
-			return " title='Click to sort by $name.'";
+			if (!column_sortable($column['id'])) return "title='$name'";
+			$name = mb_strtolower($name);
+			return "title='Click to sort by $name.'";
 		}
 
 		// Note: Changing the names or columns displayed requires updating
@@ -33,7 +32,7 @@
 			['id' => "name", 'name' => "Name"],
 			['id' => "description", 'name' => "About", 'name_long' => "Description"],
 			['id' => "users", 'name' => "#", 'name_long' => "Active Users"],
-			['id' => "preview", 'name' => "Preview"],
+			['id' => "preview", 'name' => "Preview", 'name_long' => "Preview (external link)"],
 			['id' => "qr_code", 'name' => "QR", 'name_long' => "QR Code (for use in-app)"],
 			['id' => "server_icon", 'name' => "Host", 'name_long' => "Server host"],
 			['id' => "join_url", 'name' => "URL", 'name_long' => "Join URL (for use in-app)"],
@@ -42,8 +41,8 @@
 
 	<table id="tbl_communities">
 		<tr>
-<?php foreach ($TABLE_COLUMNS as $colno => $column): ?>
-			<th<?=sort_onclick($colno)?> id="th_<?=$column['id']?>" class="tbl_communities__th">
+<?php foreach ($TABLE_COLUMNS as $column): ?>
+			<th <?=sort_onclick($column)?> id="th_<?=$column['id']?>" class="tbl_communities__th">
 				<?=$column['name']?>
 
 			</th>