Merge branch 'new-group-page' into 'master'

New group page

Implementing from https://gitlab.com/gitlab-org/gitlab-ce/issues/3480#note_2722988

cc @skyruler 

For https://gitlab.com/gitlab-org/gitlab-ce/issues/3480

See merge request !2174

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.4.0 (unreleased)
+  - Implement new UI for group page
 
 v 8.3.0
   - Add CAS support (tduehr)

VERSION

-8.3.0.pre
+8.4.0.pre

app/views/groups/_projects.html.haml

-.panel.panel-default.projects-list-holder
-  .panel-heading.clearfix
+.projects-list-holder
+  .projects-search-form
     .input-group
       = search_field_tag :filter_projects, nil, placeholder: 'Filter by name', class: 'projects-list-filter form-control', spellcheck: false
       - if can? current_user, :create_projects, @group

app/views/groups/show.html.haml

@@ -5,24 +5,33 @@
   - if current_user
     = auto_discovery_link_tag(:atom, group_url(@group, format: :atom, private_token: current_user.private_token), title: "#{@group.name} activity")
 
-.dashboard
-  .header-with-avatar.clearfix
+.cover-block
+  .avatar-holder
+    = link_to group_icon(@group), target: '_blank' do
       = image_tag group_icon(@group), class: "avatar group-avatar s90"
-    %h3
+  .cover-title
     = @group.name
-    .username
+
+  .cover-desc.username
     @#{@group.path}
+
   - if @group.description.present?
-      .description
+    .cover-desc.description
       = markdown(@group.description, pipeline: :description)
-  %hr
 
-  = render 'shared/show_aside'
+- if can?(current_user, :read_group, @group)
+  %ul.center-top-menu.no-top
+    %li.active
+      = link_to "#activity", 'data-toggle' => 'tab' do
+        Activity
+    - if @projects.present?
+      %li
+        = link_to "#projects", 'data-toggle' => 'tab' do
+          Projects
 
-  - if can?(current_user, :read_group, @group)
-    .row
-      %section.activities.col-md-7
-        .hidden-xs
+  .tab-content
+    .tab-pane.active#activity
+      .gray-content-block.activity-filter-block
         - if current_user
           = render "events/event_last_push", event: @last_push
           .pull-right
@@ -30,12 +39,13 @@
               %i.fa.fa-rss
 
           = render 'shared/event_filter'
-            %hr
 
       .content_list
       = spinner
-      %aside.side.col-md-5
+
+    .tab-pane#projects
       = render "projects", projects: @projects
-  - else
+
+- else
   %p
     This group does not have public projects