Camera translation (#3747)

* citra_qt: correct spelling in configuration

* citra_qt/camera: Changed the order of the translation

The translation may not correspond to "couln't load" and "the camera", so create two cases which can get translated individually.
Also add a space after "the camera".

* citra_qt/camera: use the same syntax for the filter in "still_image_camera.cpp" as in "configure_camera.cpp"

* citra_qt/camera: the config should only get added if it's not empty

src/citra_qt/camera/still_image_camera.cpp

@@ -52,7 +52,7 @@ const std::string StillImageCameraFactory::getFilePath() {
         temp_filters << QString("*." + QString(type));
     }
 
-    QString filter = QObject::tr("Supported image files (") + temp_filters.join(" ") + ")";
+    QString filter = QObject::tr("Supported image files (%1)").arg(temp_filters.join(" "));
 
     return QFileDialog::getOpenFileName(nullptr, QObject::tr("Open File"), ".", filter)
         .toStdString();