Bug 33417: Create standard toolbar component

Bug 33417: Create standard toolbar component

This commit introduces a standard Toolbar component that can be used
throughout ERM

Test plan:
1) Apply patch
2) Navigate to Agreements and click the "Add agreement" button - this
   should work as normal
3) Navigate to Licenses and repeat
4) Navigate to Local packages and repeat
5) Navigate to local titles - there should be two buttons, one to add and
   one to import. These should work as normal

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>