Created Issue: [0.3.x] !py command returns 'script is bot found', but file exists [13424]

!py c:\scripts\test.py
OK
!py c:\scripts\TEST.PY
'script is not found'
!py c:\scripts\test.PY
'script is not found'
!py c:\scripts\TEST.py
OK

It is clear what !py works finy only with lowercase .py extension