LinkedModelGroupView: Un-focus filter edit...

... whenever the user clicks other widgets

src/gui/widgets/LinkedModelGroupViews.cpp

@@ -42,6 +42,11 @@ LinkedModelGroupView::LinkedModelGroupView(QWidget* parent,
 	m_colNum(colNum),
 	m_layout(new ControlLayout(this))
 {
+	// This is required to remove the focus of the line edit
+	// when e.g. another spin box is being clicked.
+	// Removing the focus is wanted because in many cases, the user wants to
+	// quickly play notes on the virtual keyboard.
+	setFocusPolicy( Qt::StrongFocus );
 }