Bug 13437: Replace javascript function parameter in builder

Bug 13437: Replace javascript function parameter in builder

The builder contains js functions with a parameter like subfield_managed
or i or something similar. This parameter contains the html id of the
field corresponding with the plugin.
With the functionality of Koha::FrameworkPlugin in place, we can eliminate
one js function call and get the same id via the event passed in. Note
that this actually makes the function a 'real' event handler.

Also note that in many cases this parameter was not used but the id
was borrowed from a perl variable like $params->{id}. If the field is not
cloned, this is not a problem. But some fields can be cloned and should
not use the static perl value but should get it from the event.

Test plan:
Look for js errors when loading the marc editor.
Since the Focus or Click event code has been touched for most marc21
plugins, move your cursor into the field or click on the tag editor
button. Verify that the focus event updates the correct field or the
click event correctly launches the plugin AND the value comes back into
the right field.
Bonus: Attach a plugin with popup (like leader) to 040$d. Clone this field.
Verify that the two launch buttons operate on the correct value.
(This resolves a current bug.)

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Checked all 15 plugins.
Plugin marc21_linking_section seems to work, but I could not get it to pass
back something useful into my field. (Same without this patch.)
Tested the clone button with leader on 040d.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
All seems to work, no errors

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>