Add validation mode to UiUtil.DialogSaveCancel

[devin-ai-integration]

Summary

Enhances UiUtil.DialogSaveCancel in lib/UiUtil.js with an optional aValidationOption parameter that enables a validation + data-preservation flow, matching the pattern already used by DialogWithDateRange and DialogWithCustomBody.

When aValidationOption is provided, the dialog:

• Deep-clones jsonObject into cloneObject once (persisted across re-opens on validation failure).
• Builds the dialog body via createBody(cloneObject) on every open.
• On Save, reads widgets into cloneObject via UiUtil.PopulateJsonFromDialog BEFORE the swal is destroyed.
• Runs onValidate(cloneObject, callback). If callback is called with a non-empty fail message, DialogError is shown and DialogSaveCancel is re-invoked recursively with the same aValidationOption (preserving cloneObject).
• On pass, invokes jsOk(cloneObject) with the validated data.
• Optionally invokes onFailValidation() before the error dialog.

Without aValidationOption, behavior is identical to the previous implementation (backward compatible).

Review & Testing Checklist for Human

• Confirm existing call sites of DialogSaveCancel (no aValidationOption) still behave exactly as before — the original DialogTwoButton pass-through path is preserved.
• Exercise a new call site that supplies aValidationOption with divBodyName, jsonObject, createBody, and onValidate: verify that failed validation re-opens the dialog with user input preserved, and that successful validation invokes jsOk(cloneObject) with the populated data.
• Verify that onFailValidation (if provided) runs before the DialogError is shown when validation fails.

Notes

• File uses CRLF line endings; line endings were preserved.
• node --check lib/UiUtil.js passes syntax check.
• No other files modified.

Link to Devin session: https://app.devin.ai/sessions/e9806690a79842e9964a7e2baf9c4e93
Requested by: @shujutech