Fix ui freeze on import

[pl-buiquang]

Please check if the PR fulfills these requirements (please use '[x]' to check the checkboxes, or submit the PR and then click the checkboxes)

• [x ] The commit message follows our guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) feature

What is the current behavior? (You can also link to an open issue here) Some long running code is executed on ui thread

What is the new behavior (if this is a feature change)? Utility method added to exec only necessary ui code on ui thread

[sonarcloud[bot]]

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