Do not start prompt with the current search constraint when applying a new one

src/actions.cpp

@@ -3020,7 +3020,7 @@ void findItem(const SearchDirection direction)
 	assert(w != nullptr);
 	assert(w->allowsSearching());
 	
-	std::string constraint = w->searchConstraint();
+	std::string constraint;
 	try
 	{
 		ScopedValue<bool> disabled_autocenter_mode(Config.autocenter_mode, false);