Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Ib6e4c8a7ee8685e2d483ddac960acf72d14c2cab
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"