Fix btn-group align

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/generic/buttons.scss

@@ -177,5 +177,15 @@
   }
 }
 
+.btn-group {
+  &.btn-grouped {
+    margin-right: 7px;
+    float: left;
+    &:last-child {
+      margin-right: 0px;
+    }
+  }
+}
+
 .btn-group-small > .btn { @extend .btn.btn-small; }
 .btn-group-tiny > .btn { @extend .btn.btn-tiny; }

app/views/projects/branches/_branch.html.haml

@@ -10,7 +10,7 @@
           %i.icon-lock
     .pull-right
       - if can?(current_user, :download_code, @project)
-        = render 'projects/repositories/download_archive', ref: branch.name, btn_class: 'grouped btn-group-small'
+        = render 'projects/repositories/download_archive', ref: branch.name, btn_class: 'btn-grouped btn-group-small'
       - if branch.name != @repository.root_ref
         = link_to project_compare_index_path(@project, from: @repository.root_ref, to: branch.name), class: 'btn btn-grouped btn-small', method: :post, title: "Compare" do
           %i.icon-copy

app/views/projects/tags/_tag.html.haml

@@ -15,7 +15,7 @@
 
     %span.pull-right
       - if can? current_user, :download_code, @project
-        = render 'projects/repositories/download_archive', ref: tag.name, btn_class: 'grouped btn-group-small'
+        = render 'projects/repositories/download_archive', ref: tag.name, btn_class: 'btn-grouped btn-group-small'
       - if can?(current_user, :admin_project, @project)
         = link_to project_tag_path(@project, tag.name), class: 'btn btn-small remove-row grouped', method: :delete, data: { confirm: 'Removed tag cannot be restored. Are you sure?'}, remote: true do
           %i.icon-trash