1. Media menu strings are translated now.

2. Save/Quit dialogs are also translated now.
3. Fix Sound Gain text cutoff.

src/qt/qt_harddiskdialog.cpp

@@ -29,6 +29,7 @@ HarddiskDialog::HarddiskDialog(bool existing, QWidget *parent) :
 {
     ui->setupUi(this);
 
+    ui->fileField->setFilter(tr("Hard disk images (*.HD? *.hd? *.IM? *.im? *.VHD *.vhd);;All files (*)"));
     if (existing) {
         setWindowTitle(tr("Add Existing Hard Disk"));
         ui->lineEditCylinders->setEnabled(false);