Merge pull request #261 from rcordovano/thumbnail_multi_select

Thumbnail multi select
Updated ExtractAction for multi-select
Merge branch 'single_extract_dialog', remote-tracking branch 'upstream/master' into single_extract_dialog
Merge pull request #262 from rcordovano/single_extract_dialog

Updated ExtractAction for multi-select
Updated multi-file export to use unique names and to save to exports folder
Updated log messages for ingest loader to help debug when modules are not found