PropertyPanel has a fixed height for section headers

Maybe this ‘22’ could be exposed as a configurable value somewhere - LookAndFeel?

SectionComponent (const String& sectionTitle,
                  const Array<PropertyComponent*>& newProperties,
                  const bool sectionIsOpen)
    : Component (sectionTitle),
      titleHeight (sectionTitle.isNotEmpty() ? 22 : 0),
      isOpen (sectionIsOpen)
{

I’ve added this to develop here.