Fix METS extractor

Add parent id before saving and fix nested set problem
Fix top-level descriptions filter, fixes #6199
Start/end dates changes in ES, fixes #6218

Include start/end date string fields and exclude date fields in ES '_all' field
Remove ead namespaces refs #6234
Updating bootstrap to 2.3.2 references #5590
Add ability to configure RAD and ISAD headings.
Execute region facet on non_analized, fixes #5982

Luckly, we had indexed both an analyzed and non_analyzed (untouched) version
of the field, so reindexing is not necessary.
Fix glitch in .inline-search, refs #5590
Save ES documents after job in qtSwordPluginWorker
Change comment
Fix some filters in advanced search

- Fix media type process field
- Fix how material type is added to ES

Fixes #6295
Avoid PHP warning in fopen, fixes #6296