Added changeEvent calls where appropriate

Need to call into the superclass in order not to lose functionality. Was
missing in the wizard, hence the many missing occurrences.

Reviewed-by: Friedemann Kleint

src/plugins/projectexplorer/buildstepspage.cpp

@@ -236,6 +236,7 @@ void BuildStepsPage::downBuildStep()
 
 void BuildStepsPage::changeEvent(QEvent *e)
 {
+    BuildStepConfigWidget::changeEvent(e);
     switch (e->type()) {
     case QEvent::LanguageChange:
         m_ui->retranslateUi(this);