recorder: Make screencast filename translateable

The screenshot file name can be translate so should the screencast as well.

js/ui/main.js

@@ -110,7 +110,9 @@ function _initRecorder() {
         } else {
             // read the parameters from GSettings always in case they have changed
             recorder.set_framerate(recorderSettings.get_int('framerate'));
-            recorder.set_filename('Screencast at %d %t.' + recorderSettings.get_string('file-extension'));
+            /* Translators: this is a filename used for screencast recording */
+            // xgettext:no-c-format
+            recorder.set_filename(_("Screencast at %d %t.") + recorderSettings.get_string('file-extension'));
             let pipeline = recorderSettings.get_string('pipeline');
 
             if (!pipeline.match(/^\s*$/))

po/POTFILES.in

@@ -16,6 +16,7 @@ js/ui/endSessionDialog.js
 js/ui/extensionSystem.js
 js/ui/keyboard.js
 js/ui/lookingGlass.js
+js/ui/main.js
 js/ui/messageTray.js
 js/ui/networkAgent.js
 js/ui/notificationDaemon.js