Bug 23458: Clean up holds template in the staff client

Bug 23458: Clean up holds template in the staff client

This patch reindents reserve/request.tt to use four spaces and
to eliminate tabs, following coding guidelines. Trailing white space has
been removed.

To test, apply the patch and use your preferred method for checking the
differences between files while ignoring whitespace. I use diff with the
"-w" flag, but I'm no diffctator.

Test the process of placing a hold in the staff client: A single hold,
multiple holds, etc. Everything should work correctly.

Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>