Update ClipAudioThumbs.qml for qml2 scrollview

src/timeline2/view/qml/ClipAudioThumbs.qml

@@ -43,7 +43,7 @@ Row {
             channels: clipRoot.audioChannels
             binId: clipRoot.binId
             isFirstChunk: index == 0
-            showItem: waveform.visible && (index * waveform.maxWidth < (clipRoot.scrollStart + scrollView.viewport.width)) && ((index * waveform.maxWidth + width) > clipRoot.scrollStart)
+            showItem: waveform.visible && (index * waveform.maxWidth < (clipRoot.scrollStart + scrollView.contentItem.width)) && ((index * waveform.maxWidth + width) > clipRoot.scrollStart)
             format: timeline.audioThumbFormat
             waveInPoint: clipRoot.speed < 0 ? (Math.round(clipRoot.outPoint - (index * waveform.maxWidth / clipRoot.timeScale) * Math.abs(clipRoot.speed)) * channels) : (Math.round((clipRoot.inPoint + (index * waveform.maxWidth / clipRoot.timeScale)) * clipRoot.speed) * channels)
             waveOutPoint: clipRoot.speed < 0 ? (waveInPoint - Math.ceil(width / clipRoot.timeScale * Math.abs(clipRoot.speed)) * channels) : (waveInPoint + Math.round(width / clipRoot.timeScale * clipRoot.speed) * channels)