Fix unintentional messages list page change on page switch in compose addressbook (#1490427)

CHANGELOG

@@ -14,6 +14,7 @@ CHANGELOG Roundcube Webmail
 - Fix "Importing..." message does not hide on error (#1490422)
 - Fix Compose action in addressbook for results from multiple addressbooks (#1490413)
 - Fix bug where some messages in multi-folder search couldn't be opened (#1490426)
+- Fix unintentional messages list page change on page switch in compose addressbook (#1490427)
 
 RELEASE 1.1.2
 -------------

program/steps/mail/func.inc

@@ -161,12 +161,17 @@ function rcmail_init_env()
     if (!strlen($mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_GPC, true))) {
         $mbox = strlen($_SESSION['mbox']) ? $_SESSION['mbox'] : 'INBOX';
     }
+
+    if ($RCMAIL->action == 'list') {
         if (!($page = intval($_GET['_page']))) {
             $page = $_SESSION['page'] ? $_SESSION['page'] : 1;
         }
 
+        $_SESSION['page'] = $page;
+    }
+
     $RCMAIL->storage->set_folder($_SESSION['mbox'] = $mbox);
-    $RCMAIL->storage->set_page($_SESSION['page'] = $page);
+    $RCMAIL->storage->set_page($_SESSION['page']);
 
     // set default sort col/order to session
     if (!isset($_SESSION['sort_col'])) {