fix (Qt) issues found by clang's clazy tool:

+ -Wclazy-incorrect-emit
+ -Wclazy-strict-iterators
+ -Wclazy-overloaded-signal
+ -Wclazy-qstring-arg
+ -Wclazy-unused-non-trivial-variable
+ -Wclazy-container-anti-pattern
+ -Wclazy-range-loop-reference
+ -Wclazy-const-signal-or-slot
+ -Wclazy-detaching-temporary
+ -Wclazy-qfileinfo-exists

src/Gui/DlgActivateWindowImp.cpp

@@ -63,7 +63,7 @@ DlgActivateWindowImp::DlgActivateWindowImp(QWidget* parent, Qt::WindowFlags fl)
 
     QWidget* activeWnd = getMainWindow()->activeWindow();
 
-    for (QList<QWidget*>::ConstIterator it = windows.begin(); it != windows.end(); ++it) {
+    for (QList<QWidget*>::Iterator it = windows.begin(); it != windows.end(); ++it) {
         QTreeWidgetItem* item = new QTreeWidgetItem(ui->treeWidget);
         QString title = (*it)->windowTitle();
         title.replace(QLatin1String("[*]"), QLatin1String(""));