Add preference settings

- autodistribute, vertex size, vertex color

src/Mod/TechDraw/Gui/QGIPrimPath.cpp

@@ -52,6 +52,8 @@ QGIPrimPath::QGIPrimPath():
 
     isHighlighted = false;
 
+    m_colNormal = Qt::white;
+    m_colOverride = false;
     m_colCurrent = getNormalColor();
     m_styleCurrent = Qt::SolidLine;
     m_pen.setStyle(m_styleCurrent);
@@ -130,8 +132,15 @@ void QGIPrimPath::paint ( QPainter * painter, const QStyleOptionGraphicsItem * o
 
 QColor QGIPrimPath::getNormalColor()
 {
+
     QColor result;
     QGIView *parent;
+
+    if (m_colOverride) {
+        result = m_colNormal;
+        return result;
+    }
+
     QGraphicsItem* qparent = parentItem();
     if (qparent == nullptr) {
         parent = nullptr;
@@ -205,6 +214,13 @@ void QGIPrimPath::setStyle(Qt::PenStyle s)
     m_styleCurrent = s;
 }
 
+void QGIPrimPath::setNormalColor(QColor c)
+{
+    m_colNormal = c;
+    m_colOverride = true;
+}
+
+
 Base::Reference<ParameterGrp> QGIPrimPath::getParmGroup()
 {
     Base::Reference<ParameterGrp> hGrp = App::GetApplication().GetUserParameter()