Trigger events when app-settings visibility changes
Use global apps slide toggle logic

Remove local app settings slide logic and make it use the global one
triggered by the "data-apps-slide-toggle" attribute.
Fix default quota settings field

The default quota settings field is initially hidden which makes it
impossible for singleSelect() to make its width measurements.

This fix uses the app navigation slide "show" event to defer the
singleSelect() initialization on the default quota field.

Refactored setQuota() into UserList._updateQuota().
Refactored duplicate event handler code into UserList.onQuotaSelect().
replace spaces with tabs in apps.js
make singleselect check for gravity wish, and make it south for default quota
it does not affect gravity on planet earth, but only for tipsy
Do not close container/slider when clicking on single select field