Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: I0e3fecd3110f0afbc8f87fd2f288fa4cf3f7eb0e
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"