expression input box will lost focus if it occurs syntax error

[KayMKM]

Describe the bug

expression input box will lost focus if it occurs syntax error, or the error is solved.

Version

Browser

• Chrome
• Safari
• Firefox
• Edge

OS

• macOS
• Windows
• Ubuntu

To Reproduce

Steps to reproduce the behavior:

1. add a if condition
2. choose expression as condition
3. input an expression like "dialog.result==xxx"
4. the focus lost when enter the "=" of dialog.

Expected behavior

you can always focus on input box

Screenshots

Additional context

[cwhitten]

addressed via #2408