docs(tutorial/step_4: update test to match new $bindings behaviour

var phoneNameColumn = element.all(by.repeater('phone in phones').column('{{phone.name}}'));
should be
var phoneNameColumn = element.all(by.repeater('phone in phones').column('phone.name'));

Closes #9823
fix(filterFilter): correctly handle deep expression objects

Previously, trying to use a deep expression object (i.e. an object whose
properties can be objects themselves) did not work correctly.
This commit refactors `filterFilter`, making it simpler and adding support
for filtering collections of arbitrarily deep objects.

Closes #9698