In the new stream creation modal, added checkboxes for each stream
and a toggle to see or hide the checkboxes. Altered filtering to
filter streams and users. Added corresponding casper tests.
When a stream is checked/unchecked, it does not affect the state
of any user checkbox. This may be visually unclear as users can be
added even if their checkboxes are empty.
Fixes#2448
This is a major change to the /#subscriptions page, converting it to
by a side-by-side list of streams and their settings in an overlay.
There are no new features added/removed, but it's a huge changeset,
because it replaces the old navigation logic and moves the stream
creation modal to appear in the right side of this overlay.
The ‘for’ attribute is not valid HTML in the case of this because the
emails are invalid character sets and the input has no ID with the
email.
This changes it to a data-name which is still searchable but doesn’t
interfere with typical input behavior.
The checkboxes no longer float-left, fixing an issue with the
subscribe buttons leaning right in narrow windows.
Fixes: #1491.