Fix styles on new merge request compare page

app/assets/stylesheets/framework/panels.scss

@@ -8,7 +8,7 @@
 }
 
 
-.card-heading {
+.card-header {
   padding: $gl-vert-padding $gl-padding;
   line-height: 36px;
 

app/assets/stylesheets/pages/commits.scss

@@ -180,10 +180,6 @@
   justify-content: space-between;
   align-items: center;
   flex-grow: 1;
-
-  .merge-request-branches & {
-    flex-direction: column;
-  }
 }
 
 .commit-content {

app/assets/stylesheets/pages/cycle_analytics.scss

@@ -213,7 +213,7 @@
   .stage-panel {
     min-width: 968px;
 
-    .card-heading {
+    .card-header {
       padding: 0;
       background-color: transparent;
     }

app/assets/stylesheets/pages/groups.scss

@@ -2,7 +2,7 @@
   @include str-truncated(90%);
 }
 
-.dashboard .side .card .card-heading .input-group {
+.dashboard .side .card .card-header .input-group {
 
   .form-control {
     height: 42px;

app/assets/stylesheets/pages/members.scss

@@ -167,7 +167,7 @@
 }
 
 .card {
-  .card-heading {
+  .card-header {
     .badge.badge-pill {
       margin-top: 0;
     }

app/assets/stylesheets/pages/merge_requests.scss

@@ -499,7 +499,7 @@
 }
 
 .card-new-merge-request {
-  .card-heading {
+  .card-header {
     padding: 5px 10px;
     font-weight: $gl-font-weight-bold;
     line-height: 25px;

app/assets/stylesheets/pages/milestone.scss

@@ -31,7 +31,7 @@
     }
   }
 
-  .card-heading {
+  .card-header {
     line-height: $line-height-base;
     padding: 14px 16px;
     display: -webkit-flex;

app/assets/stylesheets/pages/settings.scss

@@ -209,7 +209,7 @@
       line-height: 12px;
     }
 
-    .card-heading .label-count {
+    .card-header .label-count {
       color: $white-light;
       background: $common-gray-dark;
     }

app/views/projects/merge_requests/creations/_new_compare.html.haml

@@ -3,8 +3,8 @@
 
 = form_for [@project.namespace.becomes(Namespace), @project, @merge_request], url: project_new_merge_request_path(@project), method: :get, html: { class: "merge-request-form form-inline js-requires-input" } do |f|
   .d-none.alert.alert-danger.mr-compare-errors
-  .merge-request-branches.js-merge-request-new-compare.row{ 'data-target-project-url': project_new_merge_request_update_branches_path(@source_project), 'data-source-branch-url': project_new_merge_request_branch_from_path(@source_project), 'data-target-branch-url': project_new_merge_request_branch_to_path(@source_project) }
-    .col-md-6
+  .merge-request-branches.js-merge-request-new-compare.row.col-md-12{ 'data-target-project-url': project_new_merge_request_update_branches_path(@source_project), 'data-source-branch-url': project_new_merge_request_branch_from_path(@source_project), 'data-target-branch-url': project_new_merge_request_branch_to_path(@source_project) }
+    .col-md-6.pl-0
       .card.card-new-merge-request
         .card-header
           Source branch
@@ -33,7 +33,7 @@
           .text-center= icon('spinner spin', class: 'js-source-loading')
           %ul.list-unstyled.mr_source_commit
 
-    .col-md-6
+    .col-md-6.pl-0
       .card.card-new-merge-request
         .card-header
           Target branch