Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I9304a5be2dd80dbff50f6c16c775d4cd32d2dfde
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"