While we have some style inconsistencies - mostly regarding split lines,
i.e. aligning to the first arguments vs. a four-space indent - there are
a couple of places where the spacing is simply wrong. Fix those.
Spotted by eslint.
https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/49
Commit 2667b9f3e5 updated the extension for a shell change that
renamed _onActivate() to _activate, but forgot to also rename the
declaration of the variable that stores the original function.
Fix this to stop a warning about assignment to an undefined variable.
https://bugzilla.gnome.org/show_bug.cgi?id=745470
Rather than re-implementing the function (and risk missing improvements
like the launch animation), call the original one as if the user had
middle-clicked the launcher.
The 'launching' signal and this._onActivateOverride callback were
removed from gnome-shell in 7ecb5af587af7ed892c6cfc5af0858a2acb04905
and 7ecb5af587af7ed892c6cfc5af0858a2acb04905 respectively.
https://bugzilla.gnome.org/show_bug.cgi?id=721864
