Bugfix : When you f6 a part with intention of modifying qty on hand, under some circumstances the changes are not saved but a record of the adjustment is created.  Now fixed.

Specifically : this will happen if you press f7 while in the f6 screen.  Trying to save the part after this would open error window 'part xxx could not be updated'.  But an adjustment record would of been created.  Problem is two small bugs working in concert.  Both bugs now fixed.