Also making thank button for mobile capitalized.
Also update for new clickTracking code.
Also promoting to stable.
Dependency: I56e2c5bc69f85e83ab3dfd9b9e617dbb98661870
Change-Id: Ifaf44fe8994a8085c30522292bba8b768da533db
If the new $wgThanksConfirmationRequired global variable is true,
require users to confirm that they want to send thanks.
Bug: 47658
Change-Id: I4663844a324a2797917b027ceb1c8c07b1e180d5