implemented vertical "zooming" in the TimelineWidget and CurveView

This comes in the form of changing the vertical scale in the CurveView and
adjusting all track heights in the Timeline.

app/widget/timelinewidget/trackview/trackviewsplitter.cpp

@@ -61,8 +61,14 @@ void TrackViewSplitter::SetTrackHeight(int index, int h)
 {
   QList<int> element_sizes = sizes();
 
+  if (alignment_ == Qt::AlignBottom) {
+    index = count() - index - 1;
+  }
+
   int old_ele_sz = element_sizes.at(index);
 
+  qDebug() << "Old ele sz" << old_ele_sz << "vs h" << h;
+
   int diff = h - old_ele_sz;
 
   // Set new size on element