Set default extensions for most save files

In most of these cases, the open file dialog won't even display a file
without the proper extension, so this helps ensure the user doesn't
accidentally misplace their files. The one exception is *.rdc, which
could be found without the extension, but could not be opened.

qrenderdoc/Windows/Dialogs/TextureSaveDialog.cpp

@@ -526,8 +526,8 @@ void TextureSaveDialog::on_browse_clicked()
 
   QString *selectedFilter = NULL;
 
-  QString filename =
-      RDDialog::getSaveFileName(this, tr("Save Texture As"), QString(), filter, selectedFilter);
+  QString filename = RDDialog::getSaveFileName(this, tr("Save Texture As"), QString(), filter,
+                                               QString(), selectedFilter);
 
   QFileInfo checkFile(filename);
   if(!filename.isEmpty())