Wrap up 14.0 restyling of content perspective

from https://docs.google.com/spreadsheets/d/1kVYrw4NeRwjifgBuRySufSKVp4XIqpHXJBw8S2xQ3M4/edit :

• Introduce 3 button types with (normal, hover and focus appearance): primary, secondary and low emphasis (current default)
• Apply these to Done, Save and Edit button and on affirmative action button on dialogs (OK/default button)
• Advanced search needs some repair work...
• If the document list is expanded, the separator (between list and document) is displayed at the end of the list...
• Need to check all dialogs. Found issues:
  • Reject project dialog (Field and texts not (properly) restyled)
  • Copy doc type
• Spacing for multiple check boxes (In selections plugin)
• Button focus should not have a background color
• Field buttons (Select / Clear / Open) should have the standard button height (36px) so that they are the same height as the default text field