LP1907115 MARC editor avoid ID collisions

LP1907115 MARC editor avoid ID collisions

Generate DOM IDs for editable content components via incrementing int
instead of a random int.  This addresses cases where records with higher
numbers of MARC fields could result id DOM ID collisions, leading to
empty subfield values.

Also remove use of Renderer2, which is considered harmful and overkill
for simple document.getElementById()-equivalent calls.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Elaine Hardy <ehardy@georgialibraries.org>
Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>