Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Icc571c4b07244a9448ed0b7c222cdc038cfa2bfd
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"