Performance improvement for importing of project translations

Problem/Motivation

Currently importing of .po files for projects could take unacceptable about of time.

Proposed resolution

I have found that problem related to implementation of locale_translation_status_save();
This could be solved by this changes:

 function locale_translation_status_save($project, $langcode, $type, $data) {
   // Load the translation status or build it if not already available.
   module_load_include('translation.inc', 'locale');
-  $status = locale_translation_get_status();
+  $status = locale_translation_get_status([$project]);
   if (empty($status)) {
     $projects = locale_translation_get_projects([$project]);
     if (isset($projects[$project])) {

Remaining tasks

Don't see for now.

User interface changes

No changes

API changes

Data model changes

Release notes snippet