Bug 34119: (Preliminary) Run stylelint fixes on print.css

Bug 34119: (Preliminary) Run stylelint fixes on print.css

This patch corrects errors raised by the new stylelint configuration in
print.css. Most of the fixes were made automatically by using the
"--fix" option:

npx stylelint koha-tmpl/intranet-tmpl/prog/css/print.css --fix

Some examples of errors fixed automatically:

- Expected indentation of 4 spaces
- Unexpected whitespace before ":"
- Unexpected unit
- Expected single space before "{"
- Expected newline after ";" in a multi-line declaration block

Errors from use of "!important" have been ignored.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>