Merge branch 'bugfix/jschatz1/missing-project-button' into 'master'

Fix group projects styles

Makes new project button visible when no projects are available.
Fixes #13193 

# BEFORE
![Screen_Shot_2016-02-04_at_1.08.27_PM](/uploads/36be9d5892506e7d1abcf4eb2a622e12/Screen_Shot_2016-02-04_at_1.08.27_PM.png)

# AFTER (w/projects)
![Screen_Shot_2016-02-04_at_1.07.48_PM](/uploads/fa257a1965017ff1274572dc66fccf90/Screen_Shot_2016-02-04_at_1.07.48_PM.png)

# AFTER (no projects)
![Screen_Shot_2016-02-04_at_1.07.28_PM](/uploads/326f6fdac24b56e8408efd0d11dc2805/Screen_Shot_2016-02-04_at_1.07.28_PM.png)

cc @creamzy @skyruler 

See merge request !2714

app/assets/javascripts/dispatcher.js.coffee

@@ -90,6 +90,7 @@ class Dispatcher
       when 'groups:new', 'groups:edit', 'admin:groups:edit', 'admin:groups:new'
         new GroupAvatar()
       when 'projects:tree:show'
+        shortcut_handler = new ShortcutsNavigation()
         new TreeView()
       when 'projects:find_file:show'
         shortcut_handler = true

app/views/groups/_projects.html.haml

 .top-area
   .nav-controls
     = form_tag request.original_url, method: :get, class: 'project-filter-form', id: 'project-filter-form' do |f|
-      = search_field_tag :filter_projects, params[:filter_projects], placeholder: 'Filter by name...', class: 'input-short project-filter-form-field form-control projects-list-filter', spellcheck: false, id: 'project-filter-form-field'
-    - if current_user && current_user.can_create_project?
-      = link_to new_project_path, class: 'btn btn-new' do
+      - if @projects.present?
+        = 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
+        = link_to new_project_path(namespace_id: @group.id), class: 'btn btn-new pull-right' do
           = icon('plus')
           New Project
 

app/views/groups/show.html.haml

@@ -32,7 +32,6 @@
     %li.active
       = link_to "#activity", 'data-toggle' => 'tab' do
         Activity
-    - if @projects.present?
     %li
       = link_to "#projects", 'data-toggle' => 'tab' do
         Projects