Reset the controlType current index to 0 in BufferViewer constructor

This keeps the UI display in sync with the code internal settings for camera choice i.e. FlyCam/ArcBall.
During the constructor, the UI setup for the different axis mappings will call on_resetCamera_clicked() and that can change the controlType current index value to be differnt from the expected/desired value of 0.

Closes#3509

Author: Zorro666

qrenderdoc/Windows/BufferViewer.cpp

@@ -2564,6 +2564,7 @@ BufferViewer::BufferViewer(ICaptureContext &ctx, bool meshview, QWidget *parent)
 
   ui->fovGuess->setValue(90.0);
 
+  ui->controlType->setCurrentIndex(0);
   on_controlType_currentIndexChanged(0);
 
   QObject::connect(ui->inTable->selectionModel(), &QItemSelectionModel::selectionChanged, this,