Add bib import process options

- Added process options for holdings
- Added process options for items
- Added overlay elements for bib
Resolve ambiguous element names

Ambiguous element names for bib overlay selector & add button (line 135)
resolved.
Bump version, v3.18.0 -> v3.18.1
Merge branch 'release/3.18.1'
Merge tag '3.18.1' into development

Bib import handling options