I run kmix 4.6 It doesn't save channels layout STEPS TO REPRODUCE 1. Open kmix window 2. Click 'Configure this view' button or go to Settings - Configure channels... 3. Add Capture channel 4. Quit 5. Start kmix, open kmix window OBSERVED RESULT Capture channel disappeared from view after restart EXPECTED RESULT Capture channel should show in view SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Frameworks 5.54.0 Qt 5.11.3 (built against 5.11.3)