paramview: changed to static viewer-bound and fixed various scrolling issues

app/widget/timelinewidget/view/timelineview.cpp

@@ -45,7 +45,6 @@ TimelineView::TimelineView(Qt::Alignment vertical_alignment, QWidget *parent) :
   setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
   setBackgroundRole(QPalette::Window);
   setContextMenuPolicy(Qt::CustomContextMenu);
-  SetLimitYAxis(true);
   viewport()->setMouseTracking(true);
 
   connect(scene(), &QGraphicsScene::selectionChanged, this, &TimelineView::SelectionChanged);

app/widget/timelinewidget/view/timelineviewbase.cpp

@@ -39,7 +39,6 @@ TimelineViewBase::TimelineViewBase(QWidget *parent) :
   playhead_scene_left_(-1),
   playhead_scene_right_(-1),
   dragging_playhead_(false),
-  limit_y_axis_(false),
   snapped_(false),
   snap_service_(nullptr)
 {
@@ -271,10 +270,4 @@ bool TimelineViewBase::WheelEventIsAZoomEvent(QWheelEvent *event)
   return (static_cast<bool>(event->modifiers() & Qt::ControlModifier) == !Config::Current()["ScrollZooms"].toBool());
 }
 
-void TimelineViewBase::SetLimitYAxis(bool)
-{
-  limit_y_axis_ = true;
-  UpdateSceneRect();
-}
-
 OLIVE_NAMESPACE_EXIT

app/widget/timelinewidget/view/timelineviewbase.h

@@ -73,8 +73,6 @@ protected:
 
   bool WheelEventIsAZoomEvent(QWheelEvent* event);
 
-  void SetLimitYAxis(bool e);
-
   rational GetPlayheadTime() const;
 
   bool PlayheadPress(QMouseEvent* event);
@@ -97,8 +95,6 @@ private:
 
   QGraphicsScene scene_;
 
-  bool limit_y_axis_;
-
   bool snapped_;
   QList<rational> snap_time_;