rerender roomlist when banner gets shown/hidden, to update the layout

src/components/structures/LeftPanel.js

@@ -212,6 +212,7 @@ const LeftPanel = React.createClass({
                     <CallPreview ConferenceHandler={VectorConferenceHandler} />
                     <RoomList
                         ref={this.collectRoomList}
+                        toolbarShown={this.props.toolbarShown}
                         collapsed={this.props.collapsed}
                         searchFilter={this.state.searchFilter}
                         ConferenceHandler={VectorConferenceHandler} />

src/components/structures/LoggedInView.js

@@ -553,6 +553,7 @@ const LoggedInView = React.createClass({
                 <DragDropContext onDragEnd={this._onDragEnd}>
                     <div ref={this._setResizeContainerRef} className={bodyClasses}>
                         <LeftPanel
+                            toolbarShown={!!topBar}
                             collapsed={this.props.collapseLhs || this.state.collapseLhs || false}
                             disabled={this.props.leftDisabled}
                         />