Input Labels Spec Documents (#3618)

* Input Labels Spec Documents

* Updated with some feedback from design discussion meeting

* More review feedback upates

* Update schema and spec to have label on all inputs

* Update test app results for new sample

samples/v1.3/Elements/Input.Label.json

@@ -0,0 +1,49 @@
+{
+ "type": "AdaptiveCard",
+ "version": "1.0",
+ "body": [
+ {
+ "type": "TextBlock",
+ "text": "Please fill out the following form:",
+ "size": "Medium"
+ },
+ {
+ "type": "Input.Text",
+ "id": "labelAsString",
+ "placeholder": "First Last",
+ "label": "Name:"
+ },
+ {
+ "type": "Input.Date",
+ "id": "labelAsTextBlock",
+ "label": {
+ "type": "TextBlock",
+ "text": "Start Date:",
+ "weight": "Bolder"
+ }
+ },
+ {
+ "type": "Input.Text",
+ "placeholder": "Placeholder text",
+ "id": "labelAsRichTextBlock",
+ "label": {
+ "type": "RichTextBlock",
+ "inlines": [
+ {
+ "type": "TextRun",
+ "text": "What is your "
+ },
+ {
+ "type": "TextRun",
+ "text": "favorite",
+ "italic": true
+ },
+ {
+ "type": "TextRun",
+ "text": " color?"
+ }
+ ]
+ }
+ }
+ ]
+}