Fix setEnabler / readSettings order

BaseAspect::setEnabler requires the settings to be read already.
This is because readSettings() does not emit "valueChanged", and so
the connections from the enabler to the target are not triggered.

Change-Id: I0c95e2b516cd03c1dbad653288b44510ec7ea800
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/autotest/ctest/ctesttool.cpp

@@ -108,6 +108,9 @@ CTestTool::CTestTool()
     threshold.setLabelText(Tr::tr("Threshold"));
     threshold.setDefaultValue(1);
     threshold.setRange(1, 128);
+
+    readSettings();
+
     threshold.setEnabler(&testLoad);
 }