Bug 11772: (follow-up) make warning about no active currency a link to currency setup...

Bug 11772: (follow-up) make warning about no active currency a link to currency setup page

This patch standardizes the name of the currency and exchange rates
administration page (although I note that the breadcrumbs on that
page are inconsistent) and makes it a link.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 4b4839e752d88c1ccba5f8c9a1296302747c0c6b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit e8037d8d040a45673996162d07bc71fb2dfd4d69)