Bug 12540: Display "Every" on editing a MMT action if previously selected

Bug 12540: Display "Every" on editing a MMT action if previously selected

On creating a marc modification template action, the "All" is changed with
"Every" if the condition field is the same as the original field.

But on editing, the "All" value is not replaced. For consistency, it
should.

Test plan:
1/ Create the following action:
    Copy field 650$x to 650$y if 650$z matches "foobar"
Note that the "All" is replaced with "Every" when the condition is the
same field as the original field.
2/ Save
3/ Edit the action.
The "Every" should be selected.

Without this patch, "All" is selected.

Signed-off-by: Alex Arnaud <alex.arnaud@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>