Bugfix: Userspecified file name was not passed to ImportContainer
Added Mark's suggestions for better efficiency
Change superclass of ParserOpenFileMessage
Set BasicEventContext logging to WARN
Merge pull request #2166 from jballanc/rebased/dev_5_0/buffered-reader-oom-fix

Prevent `ServiceHandler` from retaining excess `java.io.BufferedReader` instances (see #12049) (rebased onto dev_5_0)
Merge pull request #2164 from dominikl/rebased/dev_5_0/path_on_import_selection

Bugfix: Image import: File naming settings were ignored (rebased onto dev_5_0)