Disable mouse scrolling of QComboBox
When scrolling in a tab of Inishell, if the mouse cursor happens to be over a QComboBox or a QSpinBox, using the scroll wheel will scroll through the values in the widget (instead of scrolling through the tab). This leads to errors (because the change goes unnoticed or because the user does not remember what was set before).
This could be prevented by setting an event filter (see https://stackoverflow.com/questions/3241830/qt-how-to-disable-mouse-scrolling-of-qcombobox).