Fix review problems

- removed superfluous position and classes
- fixed compact view
- fixed event list summary avatar and text overlap
- fixed a problem where the mention list refuses to load.

src/components/views/elements/ErrorBoundary.js

@@ -73,7 +73,7 @@ export default class ErrorBoundary extends React.PureComponent {
         if (this.state.error) {
             const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
             const newIssueUrl = "https://github.com/vector-im/riot-web/issues/new";
-            return <div className="mx_ErrorBoundary mx_IRCLayout">
+            return <div className="mx_ErrorBoundary">
                 <div className="mx_ErrorBoundary_body">
                     <h1>{_t("Something went wrong!")}</h1>
                     <p>{_t(

src/components/views/elements/IRCTimelineProfileResizer.tsx

@@ -77,7 +77,9 @@ export default class IRCTimelineProfileResizer extends React.Component<IProps, I
     }
 
     private onMoueUp(event: MouseEvent) {
-        SettingsStore.setValue("ircDisplayNameWidth", this.props.roomId, SettingLevel.ROOM_DEVICE, this.state.width);
+        if (this.props.roomId) {
+            SettingsStore.setValue("ircDisplayNameWidth", this.props.roomId, SettingLevel.ROOM_DEVICE, this.state.width);
+        }
     }
 
     render() {

src/components/views/rooms/EventTile.js

@@ -659,8 +659,6 @@ export default createReactClass({
         const classes = classNames({
             mx_EventTile_bubbleContainer: isBubbleMessage,
             mx_EventTile: true,
-            mx_EventTile_irc: this.props.useIRCLayout,
-            mx_EventTile_group: !this.props.useIRCLayout,
             mx_EventTile_isEditing: isEditing,
             mx_EventTile_info: isInfoMessage,
             mx_EventTile_12hr: this.props.isTwelveHour,