Find Data button should be disabled if no valid value is provided

Steps:

• Sphere, Apply
• Edit > Find Data
• Select Sphere1 for Data Producer and hit Find Data without entering a value -- you'll get errors

Failed to evaluate Expression '(id == )'. The following exception stack should provide additional developer specific information. This typically implies a malformed expression. Verify that the expression is valid.
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The Find Data button should be disabled when the value has not been entered yet.