Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Ife60b7d16cdb29291172ef3ef8925c3d23f0c3e5
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"