Fix bug 5711: http://bugzilla.lyx.org/show_bug.cgi?id=5711.

Add button in Citation dialog grayed out when key matches the start of an already selected key.

One parameter of match() was forgotten, so the MatchFlags were basically ignored, i.e. the standard flags were used always.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@28425 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/qt4/GuiSelectionManager.cpp

@@ -144,7 +144,7 @@ bool GuiSelectionManager::isSelected(const QModelIndex & idx)
 	QVariant const & str = availableModel->data(idx, Qt::DisplayRole);
 	QModelIndexList qmil = 
 			selectedModel->match(selectedModel->index(0), 
-			                     Qt::DisplayRole, str, 
+			                     Qt::DisplayRole, str, 1,
 			                     Qt::MatchExactly | Qt::MatchWrap);
 	return !qmil.empty();
 }