fix(ui5-busyindicator): improve stylings (#1350)

Author: MapTo0

packages/main/src/themes/BusyIndicator.css

@@ -49,17 +49,12 @@
 	align-items: center;
 	position: relative;
 	background-color: inherit;
-	min-width: 8rem;
-	min-height: 3rem;
 }
 
 .ui5-busyindicator-circle {
 	display: inline-block;
 	background-color: currentColor;
 	border-radius: 50%;
-	width: 1rem;
-	height: 1rem;
-	margin: 0 .75rem;
 }
 
 .ui5-busyindicator-circle::before {