Issue 2880: Editing post doesn't destroy mentions or hashtags anymore

mod/item.php

@@ -661,6 +661,11 @@ function item_post(App $a) {
 		$datarray['edit'] = true;
 	}
 
+	// Check for hashtags in the body and repair or add hashtag links
+	if ($preview || $orig_post) {
+		Item::setHashtags($datarray);
+	}
+
 	// preview mode - prepare the body for display and send it via json
 	if ($preview) {
 		require_once 'include/conversation.php';