Address usability issues

Analytics

A `$rootScope.$apply` is removed from the `on` method of the iframe-
side cross-frame code. This code was incorrect because the registration
of a handler does not require a digest cycle. This was seemingly
innocuous before, but adding the analytics module changed the order
of injection resolution such that it caused a problem wherein a digest
cycle happens before angular has even finished compiling the DOM and
processing ng-template scripts. The result was that route templates
were not being read from the template cache and 404s resulted on
stream navigation and auth pages.

- Toolbar always open
- Show anotations changes icon and tooltip when toggled.
- .annotator-h1-focused color darkened

SetTool was a holdover from highlight mode days and doesn't do anything.

Introduce _splitTerm() for searchFilter service

Moved out from _tokenize() as a separate function to split
a search term properly into filter, term because toObject()
must call this too.

Fix #2142

Revert "Merge pull request #2086 from hypothesis/2052-scroll-to-sign-in-form-on-clicking-sign-in-link"

This reverts commit ca535b6d8a81af343489120e02326c34f71a3d46, reversing
changes made to 0988bffc2d8c968ff35bea177ac65868796b8563.

CLI utility to send invitations

Test form-input interaction with form-validate

Since changing the size of button icons in de75319 we can now style
these actions with button markup and the btn-clean class. The last
remnants of .magicontrol go away.

This reverts commit 08d991f066e48c0388ff76ce24a611c1f553a096, reversing
changes made to d488f9c491c0334ee4f46210ba17127df169a9e6.

Mock and test that half of the interaction, and in doing so show that
it's also optional to use the validator with the input.

Scroll to new annotations on creation

Use domain as citation title if no document

Partly a reaction to fce1f2c, which made icons overall smaller.

This is a bad way to address places where what we really want is the
icon as a badge on an element that has text next it. We have special
styles for buttons, but not for other scenarios. Icons should be
resized based on semantic styles for their use rather than globally.

The config blocks should be after the declarations of services, at
least, so that they can decorate services.

If necessary scroll the sidebar to show a newly created annotation (when
the user clicks the new annotation button).

Add unique ids to the <li> elements that contain the annotations, then
on creating a new annotation set the URL fragment to #<id> and scroll to
show the element.

Fixes #2053.

Bump the number of annotations loaded per request to 200

The overhead associated with a single search call is high enough that
loading only 20 annotations at once is too little. In a naive test this
reduces the time take to request about 300 annotations from 5 seconds to
about 800ms (which, IMO, is still far too slow.)

An annotation's document.title is used as the citation when displaying
an annotation. If this is an older annotation that has no document, fall
back to using the domain as the citation title instead.

Fixes #1542

Remove Dockerfile entrypoint

Handle internal server errors in the registration form

Add a test for how the frontend handles an invalid response from the
server when trying to register a user account. This happens if the
server has an uncaught exception.

Merge branch '1755-handle-internal-server-error-in-registration-form' of github.com:hypothesis/h into 1755-handle-internal-server-error-in-registration-form

Conflicts:
	h/static/scripts/account/auth-controller.coffee

Add a frontend test for when the server returns an error response with a
"reason" but no "errors" in the JSON-object response body.

When catching a non-JSON error response from the server, when trying to
register a user.