Attached patch has the following changes:

• Omit "Script Console" link on master node page for non-admins

• Omit "toggleOffline" button on node pages for non-admins

• For JNLP slave node when slave agent port is -1, remove extra error icon (it
  seems div class="error" already has an icon) and omit the link to configure page
  for non-admins

• Remove extra / in "Build History" link URL in both master and slave node sidepanel