Bug 21795: Switch two-column templates to Bootstrap grid: Notices and slips

Bug 21795: Switch two-column templates to Bootstrap grid: Notices and slips

This patch updates notices and slips templates to use Bootstrap grids
instead of YUI.

This patch also removes obsolete "text/css" attributes from <style> tags
in the modified templates.

To test, apply the patch and go to Tools -> Notices and slips. Test that
these pages look correct and adujst well to various browser widths.

 - The main page listing notices and slips
 - The add/edit form
 - The notice preview modal available when editing CHECKIN, CHECKOUT and
   HOLD_SLIP.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>