Werk #12973: Fix landing page of bulk imports

Component	User interface
Title	Fix landing page of bulk imports
Date	Jun 29, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p7 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

If hosts were imported via "Import hosts via CSV file" in a folder, the main folder was shown after finishing the import.

From now on the folder will be shown where the bulk import was started.

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