Moved the "import" button next to the "Add to project" button

Fixed padding and margins for the dropdowns on the members section

app/assets/stylesheets/framework/lists.scss

@@ -163,6 +163,10 @@ ul.content-list {
 
         &:last-child {
           margin-right: 0;
+
+          @media(max-width: $screen-xs-max) {
+            margin: 0 auto;
+          }
         }
       }
 

app/assets/stylesheets/pages/members.scss

@@ -25,7 +25,7 @@
   }
 
   .form-horizontal {
-    margin-top: 5px;
+    margin-top: 20px;
 
     @media (min-width: $screen-sm-min) {
       display: -webkit-flex;

app/views/projects/project_members/_index.html.haml

@@ -2,7 +2,6 @@
   .col-lg-3.settings-sidebar
     %h4.prepend-top-0
       Members
-      = link_to "Import", import_namespace_project_project_members_path(@project.namespace, @project), class: "btn btn-default visible-xs visible-sm pull-right", title: "Import members from another project"
     - if can?(current_user, :admin_project_member, @project)
       %p
         Add a new member to

app/views/projects/project_members/_new_project_member.html.haml

@@ -15,4 +15,4 @@
     .help-block.append-bottom-10
       On this date, the member(s) will automatically lose access to this project.
   = f.submit "Add to project", class: "btn btn-create"
-  = link_to "Import", import_namespace_project_project_members_path(@project.namespace, @project), class: "btn btn-default hidden-xs hidden-sm pull-right", title: "Import members from another project"
+  = link_to "Import", import_namespace_project_project_members_path(@project.namespace, @project), class: "btn btn-default", title: "Import members from another project"