timeline: hide snap points if the tool changes

app/widget/timelinewidget/timelinewidget.cpp

@@ -162,6 +162,8 @@ TimelineWidget::TimelineWidget(QWidget *parent) :
 
   SetMaximumScale(TimelineViewBase::kMaximumScale);
   SetAutoSetTimebase(false);
+
+  connect(Core::instance(), &Core::ToolChanged, this, &TimelineWidget::ToolChanged);
 }
 
 TimelineWidget::~TimelineWidget()
@@ -1165,6 +1167,11 @@ void TimelineWidget::ViewTimestampChanged(int64_t ts)
   emit TimeChanged(ts);
 }
 
+void TimelineWidget::ToolChanged()
+{
+  HideSnaps();
+}
+
 void TimelineWidget::AddGhost(TimelineViewGhostItem *ghost)
 {
   ghost_items_.append(ghost);