don't show RRs if manageRRs is false

src/components/structures/TimelinePanel.js

@@ -972,6 +972,7 @@ var TimelinePanel = React.createClass({
                     readMarkerVisible={ this.state.readMarkerVisible }
                     suppressFirstDateSeparator={ this.state.canBackPaginate }
                     showUrlPreview = { this.props.showUrlPreview }
+                    manageReadReceipts = { this.props.manageReadReceipts }
                     ourUserId={ MatrixClientPeg.get().credentials.userId }
                     stickyBottom={ stickyBottom }
                     onScroll={ this.onMessageListScroll }