Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I705bf4f592a20ada7d5d79b3ea1af7df4c673e2d
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"