various: greatly simplified job times

Hopefully this doesn't break everything

app/node/node.h

@@ -23,6 +23,7 @@
 
 #include <map>
 #include <QCryptographicHash>
+#include <QMutex>
 #include <QObject>
 #include <QPainter>
 #include <QPointF>
@@ -631,12 +632,7 @@ public:
    * the DAG. Even if the time needs to be transformed somehow (e.g. converting media time to sequence time), you can
    * call this function with transformed time and relay the signal that way.
    */
-  virtual void InvalidateCache(const TimeRange& range, const QString& from, int element, qint64 job_time);
-
-  void InvalidateCache(const TimeRange& range, const QString& from, int element = -1)
-  {
-    InvalidateCache(range, from, element, last_change_time_);
-  }
+  virtual void InvalidateCache(const TimeRange& range, const QString& from, int element = -1);
 
   void InvalidateCache(const TimeRange& range, const NodeInput& from)
   {
@@ -886,7 +882,7 @@ protected:
     SetInputProperty(id, QStringLiteral("combo_str"), strings);
   }
 
-  void SendInvalidateCache(const TimeRange &range, qint64 job_time);
+  void SendInvalidateCache(const TimeRange &range);
 
   /**
    * @brief Don't send cache invalidation signals if `input` is connected or disconnected
@@ -1154,8 +1150,6 @@ private:
 
   void SaveImmediate(QXmlStreamWriter *writer, const QString &input, int element) const;
 
-  void UpdateLastChangedTime();
-
   /**
    * @brief Intelligently determine how what time range is affected by a keyframe
    */
@@ -1205,8 +1199,6 @@ private:
 
   OutputConnections output_connections_;
 
-  qint64 last_change_time_;
-
   QString tooltip_;
 
   Folder* folder_;