switched many QLists for QVectors

Minor optimization

app/node/input/media/media.cpp

@@ -35,7 +35,7 @@ MediaInput::MediaInput() :
   AddInput(footage_input_);
 }
 
-QList<Node::CategoryID> MediaInput::Category() const
+QVector<Node::CategoryID> MediaInput::Category() const
 {
   return {kCategoryInput};
 }

app/node/input/media/media.h

@@ -38,7 +38,7 @@ public:
 
   virtual Stream::Type type() const = 0;
 
-  virtual QList<CategoryID> Category() const override;
+  virtual QVector<CategoryID> Category() const override;
 
   StreamPtr stream();
   void SetStream(StreamPtr s);