Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I4b6fcd670b48051d9f41755c76cb9223b492cebc
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"