Bug 9177 - Duplicate patron: Prepopulated fields ar cleared when setting cursor

Bug 9177 - Duplicate patron: Prepopulated fields ar cleared when setting cursor

When adding a duplicated patron record some fields are prepopulated from
the original patron record. Focusing your cursor on these fields
automatically clears them. This works well if you assume that the user
only focuses on fields which should be changed. This works badly if you
consider that a user might want to tab between all fields. I think the
disadvantages outweigh the minor benefit of not having to delete the
contents of a field.

This patch removes the clearing action.

TEST PLAN
---------
1) Log in to staff client
2) Patrons
3) Find an existing patron
4) Click on the link in the Name column
5) Click on the Duplicate button
6) Click on fields with data in them.
   -- they will clear, which is more problematic than correcting
      the entry.
7) On the line
   "Home > Patrons > {patron name} > Duplicate Adult Patron"
   click the patron name to go back.
8) Click on the Duplicate button
9) Tab through the fields
   -- the fields should remain unchanged, but sadly they clear.
10) Apply the patch
11) On the line
   "Home > Patrons > {patron name} > Duplicate Adult Patron"
   click the patron name to go back.
12) Click on the Duplicate button
13) Navigate through the fields
    -- tabbing nor clicking should clear any fields.
14) Run koha qa tests

NOTE: Had to rebase again. Yes, bug 7878 interfered.
      However, it deals with comment #6, which Owen
      appropriately noted.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Less surprises, improves accessibility by enabling to
tab through the form without losing data.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>