Updated issuable form to only show create links if allowed, and added...

Updated issuable form to only show create links if allowed, and added contribution guide url to form actions.

Also changed icon for labels.
Removed contribution guide notice from issue form.

app/views/projects/_issuable_form.html.haml

@@ -52,10 +52,11 @@
       - else
         %span.light No open milestones available.
        
-      = link_to 'Create new milestone', new_project_milestone_path(issuable.project), target: :blank
+      - if can? current_user, :admin_milestone, issuable.project
+        = link_to 'Create new milestone', new_project_milestone_path(issuable.project), target: :blank
 .form-group
   = f.label :label_ids, class: 'control-label' do
-    %i.icon-tag
+    %i.fa.fa-tag
     Labels
   .col-sm-10
     - if issuable.project.labels.any?
@@ -64,9 +65,15 @@
     - else
       %span.light No labels yet.
      
-    = link_to 'Create new label', new_project_label_path(issuable.project), target: :blank
+    - if can? current_user, :admin_label, issuable.project
+      = link_to 'Create new label', new_project_label_path(issuable.project), target: :blank
 
 .form-actions
+  - if contribution_guide_url(issuable.project) && !issuable.persisted?
+    %p
+      Please review the
+      %strong #{link_to 'guidelines for contribution', contribution_guide_url(issuable.project)}
+      to this repository.
   - if issuable.new_record?
     = f.submit "Submit new #{issuable.class.model_name.human.downcase}", class: 'btn btn-create'
   - else

app/views/projects/issues/_form.html.haml

 %div.issue-form-holder
   %h3.page-title= @issue.new_record? ? "New Issue" : "Edit Issue ##{@issue.iid}"
   %hr
-  - if @repository.exists? && !@repository.empty? && @repository.contribution_guide && !@issue.persisted?
-    - contribution_guide_url = project_blob_path(@project, tree_join(@repository.root_ref, @repository.contribution_guide.name))
-    .row
-      .col-sm-10.col-sm-offset-2
-        .alert.alert-info
-          = "Please review the <strong>#{link_to "guidelines for contribution", contribution_guide_url}</strong> to this repository.".html_safe
 
   = form_for [@project, @issue], html: { class: 'form-horizontal issue-form gfm-form' } do |f|
     = render 'projects/issuable_form', f: f, issuable: @issue