Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I5cbd4a2b1b3de42bad928e78d037982073c13d9c
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"