Fix dragging a composition sometimes moved it to the beginning of the clip

src/timeline2/view/qml/timeline.qml

@@ -587,7 +587,7 @@ Rectangle {
                     // We want a same track composition
                     timeline.insertNewMix(track, sameCutPos, clipBeingDroppedData)
                 } else if (!isAudioDrag) {
-                    timeline.insertNewComposition(track, frame, clipBeingDroppedData, true)
+                    timeline.insertNewCompositionAtPos(track, frame, clipBeingDroppedData)
                 } else {
                     // Cannot insert an audio mix composition
                 }

src/timeline2/view/timelinecontroller.cpp

@@ -430,14 +430,9 @@ void TimelineController::insertNewMix(int tid, int position, const QString &tran
     }
 }
 
-int TimelineController::insertNewComposition(int tid, int position, const QString &transitionId, bool logUndo)
+int TimelineController::insertNewCompositionAtPos(int tid, int position, const QString &transitionId)
 {
-    int clipId = m_model->getTrackById_const(tid)->getClipByPosition(position);
-    if (clipId > 0) {
-        int minimum = m_model->getClipPosition(clipId);
-        return insertNewComposition(tid, clipId, position - minimum, transitionId, logUndo);
-    }
-    return insertComposition(tid, position, transitionId, logUndo);
+    return insertComposition(tid, position, transitionId, true);
 }
 
 int TimelineController::insertNewComposition(int tid, int clipId, int offset, const QString &transitionId, bool logUndo)

src/timeline2/view/timelinecontroller.h

@@ -241,7 +241,7 @@ public:
        @param logUndo if set to false, no undo object is stored
        @return the id of the inserted composition
     */
-    Q_INVOKABLE int insertNewComposition(int tid, int position, const QString &transitionId, bool logUndo);
+    Q_INVOKABLE int insertNewCompositionAtPos(int tid, int position, const QString &transitionId);
     Q_INVOKABLE int insertNewComposition(int tid, int clipId, int offset, const QString &transitionId, bool logUndo);
 
     /** @brief Request deletion of the currently selected clips