Fix incorrect menu link 

lp:~trb143/openlp/fixes245 (revision 2670)
[SUCCESS] https://ci.openlp.io/job/Branch-01-Pull/1898/
[SUCCESS] https://ci.openlp.io/job/Branch-02-Functional-Tests/1809/
[SUCCESS] https://ci.openlp.io/job/Branch-03-Interface-Tests/1748/
[SUCCESS] https://ci.openlp.io/job/Branch-04a-Windows_Functional_Tests/1484/
[SUCCESS] https://ci.openlp.io/job/Branch-04b-Windows_Interface_Tests/1074/
[SUCCESS] https://ci.openlp.io/job/Branch-05a-Code_Analysis/1142/
[SUCCESS] https://...