[UWP] Inconsistent warning about inlines type

[paulcam206]

In UWP, this card is an error:

{
	"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
	"type": "AdaptiveCard",
	"version": "1.2",
	"body": [
		{
			"type": "RichTextBlock",
			"inlines": ""
		}
	]
}

however, this card is considered fine (note value of inlines):

{
	"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
	"type": "AdaptiveCard",
	"version": "1.2",
	"body": [
		{
			"type": "RichTextBlock",
			"inlines": {}
		}
	]
}

Both cards are incorrect, as inlines has to be an array type.

Note that JS incorrectly allows both of these payloads (and even doesn't require "inlines", although note that JS also doesn't require "text" on TextBlock, so that's related to a whole separate issue)

[shalinijoshi19]

Good to have; Looks like an easy fix if we can absorb it; @RebeccaAnne do we have clarity around addressing this?

[shalinijoshi19]

Moving it out of 1.2 given there are still pending