Improve button color for issue and mr pages

* make sidebar button white
* make header button gray if not primary
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

@@ -38,13 +38,13 @@
               %li
                 = link_to 'Edit', edit_namespace_project_issue_path(@project.namespace, @project, @issue)
         - if can?(current_user, :create_issue, @project)
-          = link_to new_namespace_project_issue_path(@project.namespace, @project), class: 'hidden-xs hidden-sm btn btn-nr btn-grouped new-issue-link btn-success', title: 'New issue', id: 'new_issue_link' do
+          = link_to new_namespace_project_issue_path(@project.namespace, @project), class: 'hidden-xs hidden-sm btn btn-grouped new-issue-link btn-success', title: 'New issue', id: 'new_issue_link' do
             = icon('plus')
             New issue
         - if can?(current_user, :update_issue, @issue)
-          = link_to 'Reopen issue', issue_path(@issue, issue: { state_event: :reopen }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-nr btn-grouped btn-reopen #{issue_button_visibility(@issue, false)}", title: 'Reopen issue'
-          = link_to 'Close issue', issue_path(@issue, issue: { state_event: :close }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-nr btn-grouped btn-close #{issue_button_visibility(@issue, true)}", title: 'Close issue'
-          = link_to edit_namespace_project_issue_path(@project.namespace, @project, @issue), class: 'hidden-xs hidden-sm btn btn-nr btn-grouped issuable-edit' do
+          = link_to 'Reopen issue', issue_path(@issue, issue: { state_event: :reopen }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-gray btn-grouped btn-reopen #{issue_button_visibility(@issue, false)}", title: 'Reopen issue'
+          = link_to 'Close issue', issue_path(@issue, issue: { state_event: :close }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-grouped btn-close #{issue_button_visibility(@issue, true)}", title: 'Close issue'
+          = link_to edit_namespace_project_issue_path(@project.namespace, @project, @issue), class: 'hidden-xs hidden-sm btn btn-gray btn-grouped issuable-edit' do
             = icon('pencil-square-o')
             Edit
 

app/views/projects/merge_requests/show/_mr_title.html.haml

@@ -25,8 +25,8 @@
               = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: 'reopen-mr-link', title: 'Reopen merge request'
             %li
               = link_to 'Edit', edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: 'issuable-edit'
-        = link_to 'Close', merge_request_path(@merge_request, merge_request: { state_event: :close }), method: :put, class: "hidden-xs hidden-sm btn btn-nr btn-grouped btn-close #{issue_button_visibility(@merge_request, true)}", title: 'Close merge request'
-        = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: "hidden-xs hidden-sm btn btn-nr btn-grouped btn-reopen reopen-mr-link #{issue_button_visibility(@merge_request, false)}", title: 'Reopen merge request'
-        = link_to edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: "hidden-xs hidden-sm btn btn-nr btn-grouped issuable-edit" do
+        = link_to 'Close', merge_request_path(@merge_request, merge_request: { state_event: :close }), method: :put, class: "hidden-xs hidden-sm btn btn-grouped btn-close #{issue_button_visibility(@merge_request, true)}", title: 'Close merge request'
+        = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: "hidden-xs hidden-sm btn btn-gray btn-grouped btn-reopen reopen-mr-link #{issue_button_visibility(@merge_request, false)}", title: 'Reopen merge request'
+        = link_to edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: "hidden-xs hidden-sm btn btn-gray btn-grouped issuable-edit" do
           = icon('pencil-square-o')
           Edit

app/views/shared/issuable/_sidebar.html.haml

@@ -133,7 +133,7 @@
           .title.hide-collapsed
             Notifications
           - subscribtion_status = subscribed ? 'subscribed' : 'unsubscribed'
-          %button.btn.btn-block.btn-gray.js-subscribe-button.issuable-subscribe-button.hide-collapsed{ type: "button" }
+          %button.btn.btn-block.btn-default.js-subscribe-button.issuable-subscribe-button.hide-collapsed{ type: "button" }
             %span= subscribed ? 'Unsubscribe' : 'Subscribe'
           .subscription-status.hide-collapsed{data: {status: subscribtion_status}}
             .unsubscribed{class: ( 'hidden' if subscribed )}