Should be enough to add the object to the automation pattern only once,
as the objModel variable that is added will always be the same for the
same value of ccid, which indexes the ccs array.

This will speed up creation of automation tracks for MIDI CCs and pitch
bend.

Too short notes had their duration rounded down to 0 on import,
as MIDI precision allows way shorter notes than LMMS, and
portsmf reports the duration as a double, where a beat == 1.0.

Was going to use ceil() first, but that might round some notes
up to a slightly longer duration.

Name the automation tracks like "[MIDI trackname] CC ##". And don't
call the automation track creation function for every CC event, as
it now will involve constructing a QString.

This should keep LMMS responsive from the window managers POV, unless
the user selects a huge enough default sound font that loading it
takes too long.

AFAIK, this is how the General MIDI standard says it should be.

changed an odd type juggling into something slightly saner.

…n tracks