[gnome-boxes] Updated Polish translation

[Piotr Drąg <piotrdrag src gnome org>]

commit ec4640e7915e20a20cb898d337d7695723ec21d1
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Mar 1 22:07:37 2016 +0100

    Updated Polish translation

 po/pl.po |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/po/pl.po b/po/pl.po
index 4a68a0f..1ac4c0d 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -11,8 +11,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: gnome-boxes\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-02-06 17:10+0100\n"
-"PO-Revision-Date: 2016-02-06 17:11+0100\n"
+"POT-Creation-Date: 2016-03-01 22:04+0100\n"
+"PO-Revision-Date: 2016-03-01 22:05+0100\n"
 "Last-Translator: Piotr Drąg <piotrdrag gmail com>\n"
 "Language-Team: Polish <gnomepl aviary pl>\n"
 "Language: pl\n"
@@ -1004,7 +1004,12 @@ msgid "_URI"
 msgstr "Adres _URI"
 
 #. Translators: This is a button to open box(es) in new window(s)
-#: ../src/selectionbar.vala:152 ../src/selectionbar.vala:154
+#: ../src/selectionbar.vala:152
+msgctxt "0 items selected"
+msgid "_Open in new window"
+msgstr "_Otwórz w nowym oknie"
+
+#: ../src/selectionbar.vala:154
 #, c-format
 msgid "_Open in new window"
 msgid_plural "_Open in %d new windows"