UI: Fix transform shortcuts for audio only sources

The edit, copy, paste and reset transform shortcuts would still work
for audio only sources, even though the menu was hidden for these.

UI/window-basic-main.cpp

@@ -3311,9 +3311,24 @@ void OBSBasic::SourceToolBarActionsSetEnabled()
 	RefreshToolBarStyling(ui->sourcesToolbar);
 }
 
+void OBSBasic::UpdateTransformShortcuts()
+{
+	OBSSource source = obs_sceneitem_get_source(GetCurrentSceneItem());
+	uint32_t flags = obs_source_get_output_flags(source);
+	bool audioOnly = (flags & OBS_SOURCE_VIDEO) == 0;
+
+	ui->actionEditTransform->setEnabled(!audioOnly);
+	ui->actionCopyTransform->setEnabled(!audioOnly);
+	ui->actionPasteTransform->setEnabled(audioOnly ? false
+						       : hasCopiedTransform);
+
+	ui->actionResetTransform->setEnabled(!audioOnly);
+}
+
 void OBSBasic::UpdateContextBar(bool force)
 {
 	SourceToolBarActionsSetEnabled();
+	UpdateTransformShortcuts();
 
 	if (!ui->contextContainer->isVisible() && !force)
 		return;

UI/window-basic-main.hpp

@@ -662,6 +662,8 @@ private:
 
 	bool restartingVCam = false;
 
+	void UpdateTransformShortcuts();
+
 public slots:
 	void DeferSaveBegin();
 	void DeferSaveEnd();