Release notes of Windows 10 Build 10540 has been leaked by regular Windows leakster WZor. This build is supposed to be the first major Windows 10 update release or commonly referred as Threshold 2 or TH2 update coming to everyone, sometime in November.
As per the release notes,
“You can now build jump lists for Windows Store apps (immersive apps). Note that the jump list content will now also be available from tiles in Start and the All apps list, in addition to the taskbar and the Most Used list in Start.”