Form - Fix form node not passing on msg.topic on submit

[cgjgh]

Description

Fixes msg.topic not being applied on form submits.
Not completely sure if this meets any previously agreed upon design pattern for applying topics.

Related Issue(s)

Closes #1453

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
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• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Includes a DB migration? -> add the area:migration label

[joepavitt]

Thanks @cgjgh - this is an odd one, as the appendTopic function runs as a universal line in

node-red-dashboard/nodes/config/ui_base.js

Lines 581 to 590 in 13c32b0

	try {
	msg = await appendTopic(RED, widgetConfig, wNode, msg)
	// pre-process the msg before send on the msg (if beforeSend is defined)
	if (widgetEvents?.beforeSend && typeof widgetEvents.beforeSend === 'function') {
	msg = await widgetEvents.beforeSend(msg)
	}
	// send the msg onwards
	wNode.send(msg)

Which is part of the onAction handler in our ui-base. So the change you've submitted, whilst working, feels like it's covering another issue we have somewhere