Import cuesheet is shown in detail view even if not imported yet #587

Describe the bug
An import cuesheet is shown in detail view even if not imported yet.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'ImportView' and analyze a valid text import
2. Click on 'DetailView'
3. See the import cuesheet beeing displayed

Expected behavior
Detail view should be empty since the Import has not been completed yet.

Screenshots

** Additional Context**
Switching to record view and back to detail view let the import cuesheet disappear.