Restore application.js to its state in 3dc09554a839ef19f984d6503711b0072f95a969.
Restore application.js to its state in 3dc09554a839ef19f984d6503711b0072f95a969.

For our purposes, application.js was modified at two points in time:

1. the frontend/backend split in 3dc09554a839ef19f984d6503711b0072f95a969
2. commit 60a9b938b408b934edbe7315ec85bb9133deefe4 from upstream

Modification (2) introduced a switch from jQuery 1 to 2, which is why
application.js showed up again at app/assets/javascripts.  However, this
causes problems with the asset pipeline and the frontend split, because
there's nothing in app/assets/javascripts/components anymore.

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