Includes changes to the Vue container registry component to support
the display of an empty message and error message when invalid
characters are found in the group, project or branch name.

repositories/index.html.haml has been changed to remove the content
and place into Vue component.

Replaces .card-header > hX.card-title with hX.card-header to remove
.card-title. At a occurrence where bold styling is not necessary,
div.card-header is used instead.
By full removal of .card-title at the moment, all workarounds for
BS4's card-title are removed as well.

More information: https://getbootstrap.com/docs/4.0/migration/#panels



Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Adds better support for i18n

Adds specs

Formats dates
Fixes clipboard button
Simplifies HTML

Conflicts:
	db/schema.rb

  - Fixes project, container_image and tag deletion
  - Removed container_images_repository

[ci skip]

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

With new navigation design it makes no sense to duplicate title in the
header

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>