chore: simplify guided prompt sample for dialog

[kineticjs]

This simplifies the sample for guided prompt in dialog, to avoid issue #9902 untill the issue is fixed.

Steps to reproduce the issue in the sample for AI GuidedPrompt with dialog:

1. Click the "Generate" ai-button to open a dialog
2. In the dialog, click "Apply" and wait [few seconds] until the generation ends and the ai-button text becomes "Revise"
3. Click the "Close" button to close the dialog
4. Click the "Send" button at the footer => the user is notified that the message is sent and the form is cleared
5. Repeat step 2 to re-open the dialog to compose new text
   Expected: In the dialog, the text of the ai-button is "Apply"
   Actual: the text of the ai-button is not entirely visible

With this change, clicking the footer "Send" button does not reset the state of the ai-button (as is also the case in the similar QuickPrompt sample) but the purpose of the sample is preserved.