Bug 9633 - Replace YUI button on the itemtypes administration page with Bootstrap

Bug 9633 - Replace YUI button on the itemtypes administration page with Bootstrap

This patch converts the toolbar on the itemtypes administration page to
Bootstrap, replacing YUI button code with Bootstrap markup.

Small unrelated edit: Button label text case correction.

To test, view the itemtypes administration page and confirm that the
'New item type' button looks correct and works correctly.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Comment: Work and look correctly. No errors.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works nicely, no problems found.
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>