Bug 21139: Floating toolbar - Remove dup id

Bug 21139: Floating toolbar - Remove dup id

We should not have twice the same id, we always use fixFloat() on an
element with an id and then duplicate this element.
The id must be changed (just in case)

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 77196e91402cdb59242f80e596f1812d238923c2)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit af2ccb13e3001f388a320a0619e22871429e09b5)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>