ui: implemented keyboard controls for inserting/overwriting footage into the

timeline

Allows users to use the keyboard to place footage into the timeline rather than
forcing them to drag.

app/widget/timelinewidget/timelinewidget.cpp

@@ -418,6 +418,11 @@ void TimelineWidget::DeleteSelected()
   Core::instance()->undo_stack()->pushIfHasChildren(command);
 }
 
+void TimelineWidget::RippleDelete()
+{
+
+}
+
 void TimelineWidget::IncreaseTrackHeight()
 {
   if (!GetConnectedNode()) {
@@ -446,6 +451,16 @@ void TimelineWidget::DecreaseTrackHeight()
   }
 }
 
+void TimelineWidget::InsertFootageAtPlayhead(const QList<Footage*>& footage)
+{
+  import_tool_->PlaceAt(footage, GetTime(), true);
+}
+
+void TimelineWidget::OverwriteFootageAtPlayhead(const QList<Footage *> &footage)
+{
+  import_tool_->PlaceAt(footage, GetTime(), false);
+}
+
 QList<TimelineViewBlockItem *> TimelineWidget::GetSelectedBlocks()
 {
   QList<TimelineViewBlockItem *> list;