Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I9ac03989e6f2e0dbdb3cd3b1edf119c3882c30f5
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"