LP1980275 Bootstrap - buttons on two lines in current hold screen

LP1980275 Bootstrap - buttons on two lines in current hold screen

This fixes the button arrangement in the Bootstrap Opac's Current Items on Hold screen.

To test:
1. Place some items on hold for patron.
2. Login as that patron in the Bootstrap opac.
3. View the Current Items on Hold screen and notice the buttons are on two lines.
4. Apply the patch.
5. View the Current Itesms on Holcs screen to see that the buttons are now arranged on a
single line.

Signed-off-by: Garry Collum <gcollum@gmail.com>