Fix #472 (#481)

Use svh instead of % to ensure that chat bar is not covered by browser bar in safari

Author: itsAlexNguyen

src/lib/Room/Room.scss

@@ -1,6 +1,6 @@
 .vac-col-messages {
 	position: relative;
-	height: 100%;
+	height: 100svh;
 	flex: 1;
 	overflow: hidden;
 	display: flex;