Readme file update

src/utils/ActionIndicatorOverlayBox.mjs

@@ -143,6 +143,43 @@ function ClearCall()
 	$('#overlayBox').hide();
 }
 
+/*
+The below class will need the following CSS set
+
+Progress indicator (#indicator):
+.progress {
+	width: 100px;
+	height: 100px;
+	background: rgba(255, 255, 255, 0.6);
+	border: 20px solid rgba(255, 255, 255 ,0.25);
+	border-left-color: rgba(3, 155, 229 ,1);
+	border-top-color: rgba(3, 155, 229 ,1);
+	border-radius: 50%;
+	display: inline-block;
+	animation: progress-move 600ms infinite linear;
+	left: 0;
+	top: 0;
+	position: absolute;
+	z-index: 1000;
+}
+@keyframes progress-move {
+	to {
+		transform: rotate(1turn)
+	}
+}
+
+Overlay box darken background (#overlayBox):
+.overlayBoxElement {
+	background-color: rgba(0, 0, 0, 0.3);
+	height: 100%;
+	left: 0;
+	position: fixed;
+	top: 0;
+	width: 100%;
+	z-index: 98;
+}
+*/
+
 class ActionIndicatorOverlayBox {
 
 	// open overlay boxes counter for z-index