Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Ia78439a5c11ffa2cab106be11e0bf484f1dc8169
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"