Fix Bug 1103396 - Move Thunderbird start page to bedrock and make it localizable
Merge pull request #2539 from kyoshino/bug-1103396-thunderbird-start

Fix Bug 1103396 - Move Thunderbird start page to bedrock and make it localizable
[fix bug 1114609] Update UiTour JS lib and documentation for Firefox Hello
Merge pull request #2606 from alexgibson/update-uitour-js-lib

[bug 1114609] Update UiTour JS lib and documentation for Firefox Hello