Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I5c4bd689d71a6a6c066ecc8f801c37d93800c05a
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"