bug 959406, fix up language lists for 1.3
Bug 947234 - Do not lazy load sources in the startup path r=julienw
Merge pull request #15354 from Pike/bug-959406-1.3-languages

bug 959406, fix up language lists for 1.3, r=kaze
Revert "Merge pull request #14831 from mpizza/Bug_937487_handle_activity"

This reverts commit 984223b294384d7c512755f395dc5f0bb9665455.