citra-qt: Rename "Stop Tracing" to "Finish Tracing".

This better reflects that no commands are supposed to show up until you hit the button a second time.

src/citra_qt/debugger/graphics_cmdlists.cpp

@@ -289,7 +289,7 @@ GPUCommandListWidget::GPUCommandListWidget(QWidget* parent) : QDockWidget(tr("Pi
 void GPUCommandListWidget::OnToggleTracing() {
     if (!Pica::DebugUtils::IsPicaTracing()) {
         Pica::DebugUtils::StartPicaTracing();
-        toggle_tracing->setText(tr("Stop Tracing"));
+        toggle_tracing->setText(tr("Finish Tracing"));
     } else {
         pica_trace = Pica::DebugUtils::FinishPicaTracing();
         emit TracingFinished(*pica_trace);