Preview feature shows white blank page after re-entry.

[lukasz-mroz]

Description

Preview option is invisible after re-entry.

Steps to Reproduce

1. Go to Settings
2. Click on Layout
3. Create new layout
4. Edit created layout
5. Click on Preview tab
6. Go back to Editor
7. Again, click on Preview tab

Result: Preview displays white blank page.

Expected behavior

Preview should display layout.

Logs, Screenshots, ...

Environment (fill where applicable)

• Version: [e.g. SMA 2.0.4.89]
• SM Version: [e.g. SM 18.04]
• OS: [e.g. Windows 10 64bit]
• OS Language: [e.g. English (UK)]