Merge pull request atom#6078 from atom/ks-associate-load-package-errors

Improve package association with uncaught errors

Merge pull request atom#5858 from atom/as-faster-fold-destroy

Speed up `destroyFoldsIntersectingBufferRange`

Remove isInitialEmptyEditor

⬆️ grunt-atom-shell-installer@0.25

⬆️ git-diff

Merge pull request atom#5733 from as-cii/efficient-cursor-merging

🐎 Speed up `mergeCursors`

⬆️ tree-view

Fix race when starting atom twice in spec

Restore old behavior of atom.open

Use ATOM_HOME env var in protocol handler

Closes atom#5501