Fix pipeline submit button reload bug

[karlaspuldaro]

Fixes #2615

What changes were proposed in this pull request?

Fix logic to trigger ok dialog button on pressing enter key as default if form passes validation

How was this pull request tested?

Check that pressing enter key triggers ok button click on submit pipeline/file dialogs and export pipeline dialog.

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[marthacryan]

Tested locally and it works as expected. Code LGTM. Thanks!

[akchinSTC]

LGTM