Add icons and better names to Project/Group nav

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

app/views/groups/edit.html.haml

@@ -4,13 +4,15 @@
       %li.active
         = link_to '#tab-edit', 'data-toggle' => 'tab' do
           %i.icon-edit
-          Edit Group
+          Group
       %li
         = link_to '#tab-projects', 'data-toggle' => 'tab' do
           %i.icon-folder-close
           Projects
       %li
-        = link_to 'Remove', '#tab-remove', 'data-toggle' => 'tab'
+        = link_to '#tab-remove', 'data-toggle' => 'tab' do
+          %i.icon-remove-sign
+          Remove
 
   .col-md-10
     .tab-content

app/views/projects/_settings_nav.html.haml

 %ul.nav.nav-pills.nav-stacked.nav-stacked-menu.append-bottom-20
   = nav_link(path: 'projects#edit') do
     = link_to edit_project_path(@project), class: "stat-tab tab " do
-      Edit Project
+      %i.icon-edit
+      Project
   = nav_link(controller: [:team_members, :teams]) do
     = link_to project_team_index_path(@project), class: "team-tab tab" do
+      %i.icon-group
       Members
   = nav_link(controller: :deploy_keys) do
     = link_to project_deploy_keys_path(@project) do
-      %span
+      %i.icon-key
       Deploy Keys
   = nav_link(controller: :hooks) do
     = link_to project_hooks_path(@project) do
-      %span
+      %i.icon-link
       Web Hooks
   = nav_link(controller: :services) do
     = link_to project_services_path(@project) do
-      %span
+      %i.icon-cogs
       Services