Update for Polish translations.

I've added missing translations and update a few exiting (in Polish we do not use space before and after ':' and '?').

locales/pl_PL/translations.php

@@ -108,7 +108,7 @@ return array(
     'Created on %B %e, %G at %k:%M %p' => 'Stworzono na %e %B %G o %k:%M',
     'There is no body assigned' => 'Nikt nie jest przypisany',
     'Column on the board:' => 'Kolumna na tablicy:',
-    'Status is open' => 'Status ostarty',
+    'Status is open' => 'Status otwarty',
     'Status is closed' => 'Status zamknięty',
     'close this task' => 'zamknij zadanie',
     'open this task' => 'otwórz zadanie',
@@ -167,21 +167,17 @@ return array(
     'Work in progress' => 'W trakcie',
     'Done' => 'Zakończone',
     'Application version:' => 'Wersja aplikacji:',
-
-    /* Missing translations:
-
-    'Completed on %B %e, %G at %k:%M %p' => '',
-    '%B %e, %G at %k:%M %p' => '',
-    'Date created' => '',
-    'Date completed' => '',
-    'Id' => '',
-    'Show this task' => '',
-    'No task' => '',
-    'completed tasks' => '',
-    'List of projects' => '',
-    'Completed tasks for "%s"' => '',
-    '%d closed tasks' => '',
-    'no task for this project' => '',
-    'Public link' => '',
-    */
+    'Completed on %B %e, %G at %k:%M %p' => 'Zakończono na %e %B %G o %k:%M',
+    '%B %e, %G at %k:%M %p' => '%e %B %G o %k:%M',
+    'Date created' => 'Data utworzenia',
+    'Date completed' => 'Data zakończenia',
+    'Id' => 'Ident',
+    'Show this task' => 'Pokaż to zadanie',
+    'No task' => 'Brak zadania',
+    'completed tasks' => 'ukończone zadania',
+    'List of projects' => 'Lista projektów',
+    'Completed tasks for "%s"' => 'Zadania zakończone dla "%s"',
+    '%d closed tasks' => '%d zamkniętych zadań',
+    'no task for this project' => 'brak zadań dla tego projektu',
+    'Public link' => 'Link publiczny',
 );