Merge remote-tracking branch 'upstream/r/11.x' into wwu/11

* upstream/r/11.x:
  Review Fixes
  Fix Admin UI builds due to missing SASS
  Patch Issue #1967, Admin-ui-frontend  migrate node-sass to sass as recommended on node-sass project site, updated scss files to support sass
  Adding note to 10.x upgrade doc regarding 10.3's changed activemq config file
  Fix wrong name of admin UI configuration file (#3532)
  Force same sample rate for audio files in PartialImport WOH encoding profiles missing changes from pr#3107
  Improve Tooltips in Documentation
  Allow index name to be changed at runtime
  Elasticsearch index retry configuration