[ADF-4406] - Confirm Dialog doesn't support a third extra button option to be customised (#4608)

* [ADF-4406] - Confirm Dialog doesn't support a third extra button option to be customised

* * comments fixed

* * docs and test added

docs/content-services/dialogs/confirm.dialog.md

@@ -10,7 +10,19 @@ Last reviewed: 2019-01-22
 Requests a yes/no choice from the user.
 
 ![Confirm dialog](../../docassets/images/ConfirmDialog.png)
+![Confirm dialog](../../docassets/images/ConfirmDialogYesAll.png)
 
+## Dialog inputs
+| Name | Type  | Default value | Description |
+| ---- | ---- | ---- | ----------- |
+| title | `string` | `Confirm` | It will be placed in the dialog title section.  |
+| yesLabel | `string` | `yes` | It will be placed first in the dialog action section |
+| noLabel | `string`  | `no`| It will be placed last in the dialog action section |
+| thirdOptionLabel (optional) | `string` | |  It is not a mandatory input. it will be rendered in between yes and no label |
+| message | `string` | `Do you want to proceed?` | It will be rendered in the dialog content area |
+| htmlContent | `html` | |  It will be rendered in the dialog content area |
+
+*note*: `if input is not passed, default value will be rendered`
 ## Basic Usage
 
 ```ts
@@ -65,6 +77,26 @@ dialogRef.afterClosed().subscribe((result) => {
 });
 ```
 
+### Rendering with thirdOptionLabel
+
+```
+       const thirdOptionLabel = "YES. DON'T SHOW IT AGAIN";
+       const dialog =  this.dialog.open(ConfirmDialogComponent, {
+            data: {
+                title: 'Upload',
+                thirdOptionLabel: thirdOptionLabel,
+                message: `This is the default message`
+            },
+            minWidth: '250px'
+        });
+       dialog.afterClosed().subscribe((status) => {
+           // do the third option label operation
+           if ( status === thirdOptionLabel) {
+               // console.log('third option clicked');
+           }
+       });
+```
+
 ## Details
 
 This component lets the user make a yes/no choice to confirm an action. Use the