Reimplementation of unauthorized dialog into separate widget. It uses RCUE
design.

New features compared to unauthorized dialog:

- reflects auth methods from `auth` module
- validation summary
- differentiates Kerberos auth failure with session expiration
- Caps Lock warning
- form based method doesn't allow password only submission

https://fedorahosted.org/freeipa/ticket/4017
https://fedorahosted.org/freeipa/ticket/3903

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

A widget which aggregates warnings and errors and shows them on one place.

https://fedorahosted.org/freeipa/ticket/3903

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

Load page is a simple facet which is displayed up to 'runtime' phase.

On application start it tells the user that there is ongoing activity.

https://fedorahosted.org/freeipa/ticket/3903

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

A widget for showing ongoing activity.

Displays a text with changing dots.

It listens to  `network-activity-start` and `network-activity-end` topics.

https://fedorahosted.org/freeipa/ticket/3903

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

This is a Web UI wide change. Fields and Widgets binding was refactored
to enable proper two-way binding between them. This should allow to have
one source of truth (field) for multiple consumers - widgets or something
else. One of the goal is to have fields and widget implementations
independent on each other. So that one could use a widget without field
or use one field for multiple widgets, etc..

Basically a fields logic was split into separate components:
- adapters
- parsers & formatters
- binder

Adapters
- extract data from data source (FreeIPA RPC command result)
- prepares them for commands.

Parsers
- parse extracted data to format expected by field
- parse widget value to format expected by field

Formatters
- format field value to format suitable for widgets
- format field value to format suitable for adapter

Binder
- is a communication bridge between field and widget
- listens to field's and widget's events and call appropriate methods

Some side benefits:
- better validation reporting in multivalued widget

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

checkboxes and radio buttons:
- do not change color on hover when disabled
- are focusable and checkable be keyboard again. This uses a little
  trick where the real checkbox is hidden under the artificial
  checkbox. That way it has the same position and therefore it
  works even in containers with overflow set.

https://fedorahosted.org/freeipa/ticket/4217

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

https://fedorahosted.org/freeipa/ticket/3369

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

This commit changes how fonts are used.

- remove usage of bundled fonts and only system fonts are used instead
  - by using alias in httpd conf
  - by using local("Font Name") directive in font-face
- removed usage of overpass font
- redefined Open Sans font-face declarations. Note: upstream is doing the
  same change so we will be fine on upgrade.
- introduce variable.less for variable definitions and overrides. This file
  will be very useful when we upgrade to newer RCUE so we will be able to
  redefine their and bootstrap's variables.

Fixes: https://fedorahosted.org/freeipa/ticket/2861

https://fedorahosted.org/freeipa/ticket/3904