Crash when apply changes to midi import panel after moving/deleting midi file

1. Drag and drop midi file (to import it)
2. Delete or Move midi file that was drag-and-dropped
3. Change "Max Quantization" in "Midi Import Panel"
4. Click "Apply" in "Midi Import Panel"
4. Observe program crash
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OS: Windows 7 64-bit SP1
Musescore 2
Version: 2.0.3
Revision: 3c7a69d

Problem signature:
Problem Event Name: APPCRASH
Application Name: MuseScore.exe
Application Version: 0.0.0.0
Application Timestamp: 0ebaeca0
Fault Module Name: Qt5Core.dll
Fault Module Version: 5.4.2.0
Fault Module Timestamp: 777a675f
Exception Code: c0000005
Exception Offset: 00273685
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789