Bug 18598 - Quick add form doesn't clear values when switching

Bug 18598 - Quick add form doesn't clear values when switching

To test:
1 - Fill out some fields in quick add
2 - Switch to full form and clear fields
3 - Switch back and fields are still populated
4 - Fill a field in long form
5 - Switch to quick add and clear it
6 - Save
7 - Value set in 4 is saved
8 - Apply patch
9 - Repeat 1-6 - values should be cleared and not saved

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>