Bug 16164: Making check expiration actions buttons

Bug 16164: Making check expiration actions buttons

EDIT: Using same font awesome icon for 'Renew' as in other places

To test:
1) Go to Serials -> Check expiration
2) Put in a date where one or more subscriptions will expire prior to this date
3) Confirm that column heading is now 'Actions'
4) Confirm that Edit and Renew now show as font awesome buttons
5) Confirm that the buttons don't wrap on narrower browsers
6) Confirm the buttons still work as expected

Sponsored-by: Catalyst IT
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com