Scan button stays active when switching Source/Target Pipeline in RP Converter

Steps to reproduce:

1. Create and open a new URP project
2. Open 'Window -> Rendering -> Render Pipeline Converter'
3. Select any checkbox in the RP Converter window (to enable the 'Scan' button)
4. Switch to another Source/Target Pipeline 
5. Observe the Scan button

Actual results: It is still active

Expected results: It is disabled

Reproducible with versions: 6000.5.0a9, 6000.5.9f1, 6000.6.0f1, 6000.7.0a6

Can’t test with versions: 6000.0.82f1, 6000.3.23f1 (No Scan button), 6000.5.0a5 (Scan button always active)

Tested on (OS): Windows 11 Pro

Notes:

• Scan button should disable upon no checkbox being selected. When switching Target/Source Pipeline, by default, no checkbox is selected, which should disable the Scan button
• After reproduction, pressing the Scan button doesn't do anything (it should be active only for the selected Source/Target Pipelines)