Add some more space to "Keywords" search field

# Widen the space available for the Keywords search field.
# To not make the Search button fall over the "Advanced Search" button
  pull the whole form down a bit
# Make the space for Group field as wide as the Set field of file manager
# Show "Advanced Search" instead of "Advanced" in link that shows Advanced
  search criteria
Merge pull request #1430 from mlocati/fix-usersearch-layout

Add some more space to "Keywords" search field of User Search