docs(ngModelController): remove bogus @param fields
docs(ngModelController): add $name property
docs(ngValue): clarify the limitations of ngValue and option elements
docs(input): replace dateTimeLocal by datetime-local

Fixes #9856
Closes #9870
docs($route): replace comma with "and"

Remove a comma and replace with "and" on line 444

Closes #9889
docs(guide/scope): describe watch depths

Describe and visualize the three watch strategies: By reference, by collection items, and by value.

Closes #9388
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