Revert "core: properly shutdown event loop"
Revert "core: properly shutdown event loop"

This reverts commit 8e249464572b34f88dc78ca420f864baf726690d.

Closes #1615
Closes #1609

This doesn't work, and I spaced and didn't revert it before release.
We need to find a new way to properly shut down the event loop.

zordsdavini/qtile,zordsdavini/qtile