nls: updates for new strings in menus

- also fixes updating tr.po file
- more descriptive instructions in CONTRIBUTING.md
- fix comments in po/pot files when using meson gettext tools

po/tr.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: labwc\n"
 "Report-Msgid-Bugs-To: https://github.com/labwc/labwc/issues\n"
-"POT-Creation-Date: 2022-04-30 16:43+1000\n"
+"POT-Creation-Date: 2023-01-02 11:22+1000\n"
 "PO-Revision-Date: 2022-11-20 17:04+0300\n"
 "Last-Translator: Oğuz Ersen <oguz@ersen.moe>\n"
 "Language-Team: Turkish <tr>\n"
@@ -16,34 +16,46 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: src/menu/menu.c:428
+#: src/menu/menu.c:631
 msgid "Reconfigure"
 msgstr "Yeniden yapılandır"
 
-#: src/menu/menu.c:430
+#: src/menu/menu.c:633
 msgid "Exit"
 msgstr "Çıkış"
 
-#: src/menu/menu.c:446
+#: src/menu/menu.c:649
 msgid "Minimize"
 msgstr "Küçült"
 
-#: src/menu/menu.c:448
+#: src/menu/menu.c:651
 msgid "Maximize"
 msgstr "Büyüt"
 
-#: src/menu/menu.c:450
+#: src/menu/menu.c:653
 msgid "Fullscreen"
 msgstr "Tam ekran"
 
-#: src/menu/menu.c:452
+#: src/menu/menu.c:655
 msgid "Decorations"
 msgstr "Süslemeler"
 
-#: src/menu/menu.c:454
+#: src/menu/menu.c:657
 msgid "AlwaysOnTop"
 msgstr "Her zaman üstte"
 
-#: src/menu/menu.c:456
+#: src/menu/menu.c:662
+msgid "Move left"
+msgstr ""
+
+#: src/menu/menu.c:667
+msgid "Move right"
+msgstr ""
+
+#: src/menu/menu.c:672
+msgid "Workspace"
+msgstr ""
+
+#: src/menu/menu.c:675
 msgid "Close"
 msgstr "Kapat"