change member save button from :button_change to :button_save (#13745)

Contributed by Daniel Felix.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12097 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/projects/settings/_members.html.erb

@@ -27,7 +27,7 @@
                                                        :disabled => member.member_roles.detect {|mr| mr.role_id == role.id && !mr.inherited_from.nil?} %> <%=h role %></label><br />
         <% end %></p>
         <%= hidden_field_tag 'membership[role_ids][]', '' %>
-        <p><%= submit_tag l(:button_change), :class => "small" %>
+        <p><%= submit_tag l(:button_save), :class => "small" %>
         <%= link_to_function l(:button_cancel),
                              "$('#member-#{member.id}-roles').show(); $('#member-#{member.id}-roles-form').hide(); return false;"
              %></p>