[zanata/zanata-platform] e21b63: fix: disable button when no roles is selected

[GitHub]

  Branch: refs/heads/ZNTA-274-language-members-add
  Home:   https://github.com/zanata/zanata-platform
  Commit: e21b632d1e5045ea18d5b5fb0ca2385670db9a85
      https://github.com/zanata/zanata-platform/commit/e21b632d1e5045ea18d5b5fb0ca2385670db9a85
  Author: Alex Eng <aeng at redhat.com>
  Date:   2017-07-24 (Mon, 24 Jul 2017)

  Changed paths:
    M server/zanata-war/src/main/java/org/zanata/action/LanguageAction.java
    M server/zanata-war/src/main/webapp/WEB-INF/layout/language/search_user_modal.xhtml

  Log Message:
  -----------
  fix: disable button when no roles is selected

https://zanata.atlassian.net/browse/ZNTA-274