[REG 3.1.2->3.2.0] Can't attach to running application with MinGW-based kit

1. Have one MinGW-based and two MSVC-based kits configured.
2. Select "Debug" -> "Start Debugging" -> "Attach to Running Application..." from the menu.
   Only the MSVC-based kits will be available in the "Kit" combo box. Thus, Creator can't attach to a running MinGW-based application anymore.

In Creator 3.1.2, all kits are being shown so attaching works correctly.