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/Transform.cpp

@@ -378,7 +378,7 @@ void Transform::on_applyButton_clicked()
 void Transform::directionActivated(int index)
 {
     if (ui->directionActivated(this, index)) {
-        /*emit*/ directionChanged();
+        Q_EMIT directionChanged();
     }
 }