Merge pull request 'C2021-034-Change-applicability-dialog-box-response-from-Yes_No_Cancel-to-Yes_No' (#401) from C2021-034-Change-applicability-dialog-box-response-from-Yes_No_Cancel-to-Yes_No into Development

ready for testing phase

PROMS/VEPROMS User Interface/frmVersionsProperties.cs

@@ -511,7 +511,7 @@ namespace VEPROMS
 
 		private void btnPC_Click(object sender, EventArgs e)
 		{
-			if (MessageBox.Show(this, "Are you sure you want to add Applicability to this Working Draft?", "Add Applicability", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Stop) == DialogResult.Yes)
+			if (MessageBox.Show(this, "Are you sure you want to add Applicability to this Working Draft?", "Add Applicability", MessageBoxButtons.YesNo, MessageBoxIcon.Stop) == DialogResult.Yes)
 			{
 				btnApplicability.Visible = true;
 				tiApplicability.Visible = true;