[Xitami] V4MD : Error Handling Suggestion

[Gunnar Swan]

Visual Basic has a function to set the errorlevel = 0.
This removes any previous errors reports in the VB kernel.

Prevoiusly, it was stated on this list that Valentina error
goes to 0 on the next success.

I would like if Valentina offered a set error = 0 also.

Valentina currently keeps the last error, and this is ok.
But the only way to get rid of the error message is for
success on the next command. 

set error = 0 , if implemented in Valentina, should clear
all errors from the kernel.

Thanks.