Don't always treat empty long patterns as BB patterns

Due to the wrong condition for GUI handling, empty patterns longer than 1 bar
was treated as BB patterns though they don't really look like.
This commit drops the erroneous check and fixes related GUI issues.

src/tracks/Pattern.cpp

@@ -713,8 +713,7 @@ void PatternView::mousePressEvent( QMouseEvent * _me )
{
	if( _me->button() == Qt::LeftButton &&
				m_pat->m_patternType == Pattern::BeatPattern &&
				( fixedTCOs() || pixelsPerTact() >= 96 ||
				m_pat->m_steps != MidiTime::stepsPerTact() ) &&
				( fixedTCOs() || pixelsPerTact() >= 96 ) &&
				_me->y() > height() - s_stepBtnOff->height() )

	// when mouse button is pressed in beat/bassline -mode
@@ -784,8 +783,7 @@ void PatternView::mouseDoubleClickEvent(QMouseEvent *_me)
void PatternView::wheelEvent( QWheelEvent * _we )
{
	if( m_pat->m_patternType == Pattern::BeatPattern &&
				( fixedTCOs() || pixelsPerTact() >= 96 ||
				m_pat->m_steps != MidiTime::stepsPerTact() ) &&
				( fixedTCOs() || pixelsPerTact() >= 96 ) &&
				_we->y() > height() - s_stepBtnOff->height() )
	{
//	get the step number that was wheeled on and
@@ -969,8 +967,7 @@ void PatternView::paintEvent( QPaintEvent * )
	}

	// beat pattern paint event
	else if( beatPattern &&	( fixedTCOs() || ppt >= 96
			|| m_pat->m_steps != MidiTime::stepsPerTact() ) )
	else if( beatPattern &&	( fixedTCOs() || ppt >= 96 ) )
	{
		QPixmap stepon0;
		QPixmap stepon200;