Add new icons for MR and close.

app/views/notify/approved_merge_request_email.html.haml

@@ -75,6 +75,7 @@
                             %tbody
                               %tr{ style: 'width:100%;' }
                                 %td{ style: "font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;font-size:15px;line-height:1.4;color:#8c8c8c;font-weight:300;padding:14px 0;margin:0;text-align:center;" }
+                                  %img{ src: image_url('mailers/approval/icon-merge-request-gray.gif'), style: "height:18px;width:18px;margin-bottom:-4px;" }
                                   %span{ style: "font-weight: bold;color:#333333;" } Merge request
                                   %a{ href: merge_request_url(@merge_request), style: "font-weight: bold;color:#3777b0;text-decoration:none" }  #{@merge_request.to_reference}
                                   %span was approved by

app/views/notify/unapproved_merge_request_email.html.haml

@@ -63,7 +63,7 @@
                               %tbody
                                 %tr
                                   %td{ style: "font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;vertical-align:middle;color:#ffffff;text-align:center;padding-right:5px;" }
-                                    %img{ alt: "✓", height: "13", src: image_url('mailers/ci_pipeline_notif_v1/icon-check-green-inverted.gif'), style: "display:block;", width: "13" }/
+                                    %img{ height: "13", src: image_url('mailers/approval/icon-x-orange-inverted.gif'), style: "display:block;", width: "13" }/
                                   %td{ style: "font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;vertical-align:middle;color:#ffffff;text-align:center;" }
                                     %span Merge request was unapproved (#{@merge_request.approvals.count}/#{@merge_request.approvals_required})
                       %tr.spacer
@@ -75,6 +75,7 @@
                             %tbody
                               %tr{ style: 'width:100%;' }
                                 %td{ style: "font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;font-size:15px;line-height:1.4;color:#8c8c8c;font-weight:300;padding:14px 0;margin:0;text-align:center;" }
+                                  %img{ src: image_url('mailers/approval/icon-merge-request-gray.gif'), style: "height:18px;width:18px;margin-bottom:-4px;" }
                                   %span{ style: "font-weight: bold;color:#333333;" } Merge request
                                   %a{ href: merge_request_url(@merge_request), style: "font-weight: bold;color:#3777b0;text-decoration:none" }  #{@merge_request.to_reference}
                                   %span was unapproved by