dont set initial phase, show panel when collapsed

src/components/structures/GroupView.js

@@ -1311,7 +1311,7 @@ export default React.createClass({
                         <div className="mx_GroupView_header_rightCol">
                             { rightButtons }
                         </div>
-                        <GroupHeaderButtons />
+                        <GroupHeaderButtons collapsedRhs={this.props.collapsedRhs} />
                     </div>
                     <MainSplit collapsedRhs={this.props.collapsedRhs} panel={rightPanel}>
                         <GeminiScrollbarWrapper className="mx_GroupView_body">

src/components/views/right_panel/HeaderButtons.js

@@ -25,7 +25,7 @@ export default class HeaderButtons extends React.Component {
         super(props);
 
         this.state = {
-            phase: initialPhase,
+            phase: props.collapsedRhs ? null : initialPhase,
             isUserPrivilegedInGroup: null,
         };
         this.onAction = this.onAction.bind(this);
@@ -58,7 +58,7 @@ export default class HeaderButtons extends React.Component {
                     phase: null,
                 });
             } else {
-                if (!this.state.phase) {
+                if (this.props.collapsedRhs) {
                     dis.dispatch({
                         action: 'show_right_panel',
                     });

src/components/views/rooms/RoomHeader.js

@@ -424,7 +424,7 @@ module.exports = React.createClass({
                     { saveButton }
                     { cancelButton }
                     { rightRow }
-                    <RoomHeaderButtons />
+                    <RoomHeaderButtons collapsedRhs={this.props.collapsedRhs} />
                 </div>
             </div>
         );