Add message bubbles

res/css/_components.scss

@@ -195,6 +195,7 @@
 @import "./views/rooms/_EntityTile.scss";
 @import "./views/rooms/_EventTile.scss";
 @import "./views/rooms/_GroupLayout.scss";
+@import "./views/rooms/_BubbleLayout.scss";
 @import "./views/rooms/_IRCLayout.scss";
 @import "./views/rooms/_JumpToBottomButton.scss";
 @import "./views/rooms/_LinkPreviewWidget.scss";