Bug 27123: Add messages to batch patrons modification

Bug 27123: Add messages to batch patrons modification

With this patch you can write or delete circulation messages on the
batch patrons modification form

Test plan:
1)Go to Home > Tools > Batch patron modification
2)Write one or more card numbers to access the modification form
3)Notice the input you can interact with
4)Apply patch and repeat 1) & 2)
5)Notice the new input 'Message:' which appeared down the form
6)Write a message and choose a type (opac or intranet)
7)Save & notice the new 'Message' column filled up with what you wrote
  before
8)To delete: back on the modification form - check the checkbox beside
  the input - save again

Signed-off-by: Valerie Burnett <valerie@bywatersolutions.com>
Signed-off-by: George Williams <george@nekls.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>