Add tabs to the right panel (#12672)

* Create new method for header button behaviour

With the introduction of tabs, the behaviour of the header buttons is
changed as follows:
- Close any right panel if open
- Open the correct right panel if no panel was open before

The old method (and behaviour) is retained as showOrHidePhase.

* Implement tabs in the right panel

There are three tabs: Info, People and Threads

* Remove unwanted code from RoomSummaryCard

- Remove the menu item for opening the memberlist since that is now
  taken of by the tabs.
- Remove the close button

* Remove code for focusing close button from tac item

See https://github.com/matrix-org/matrix-react-sdk/pull/12410

There's no longer a close button to focus so we instead focus the thread
tab. This is done in RightPaneltabs.tsx so we just need to remove this
code.

* Introduce a room info icon to the header

This was previously present in the legacy room header but not in the new
header.

* BaseCard changes

- Adds id, ariaLabelledBy and role props to implement tab accessibility.
- Adds hideHeaderButtons prop to hide header buttons (think back and
  close buttons).
- Change confusing header rendering code:
  header is not rendered ONLY when no header is passed AND
  hideHeaderButtons is true.

* Refactor repeated code into function

Created a new function createSpaceScopeHeader which returns the
component if the room is a space room. Previously this code was
duplicated in every component that uses SpaceScopeHeader component.

* Pass BaseCard attributes and use helper function

Actually using the code from the last two commits

* Add, update and remove tests/screenshots/snapshots

* Fix distance between search bar and tabs

* Update compound

* Update screenshots/snapshots

src/components/structures/ThreadPanel.tsx

@@ -37,9 +37,6 @@ import { ButtonEvent } from "../views/elements/AccessibleButton";
 import Spinner from "../views/elements/Spinner";
 import Heading from "../views/typography/Heading";
 import { clearRoomNotification } from "../../utils/notifications";
-import { useDispatcher } from "../../hooks/useDispatcher";
-import dis from "../../dispatcher/dispatcher";
-import { Action } from "../../dispatcher/actions";
 
 interface IProps {
     roomId: string;
@@ -259,14 +256,6 @@ const ThreadPanel: React.FC<IProps> = ({ roomId, onClose, permalinkCreator }) =>
         }
     }, [timelineSet, timelinePanel]);
 
-    useDispatcher(dis, (payload) => {
-        // This actually foucses the close button on the threads panel, as its the only interactive element,
-        // but at least it puts the user in the right area of the app.
-        if (payload.action === Action.FocusThreadsPanel) {
-            closeButonRef.current?.focus();
-        }
-    });
-
     return (
         <RoomContext.Provider
             value={{
@@ -277,6 +266,7 @@ const ThreadPanel: React.FC<IProps> = ({ roomId, onClose, permalinkCreator }) =>
             }}
         >
             <BaseCard
+                hideHeaderButtons
                 header={
                     <ThreadPanelHeader
                         filterOption={filterOption}
@@ -284,7 +274,10 @@ const ThreadPanel: React.FC<IProps> = ({ roomId, onClose, permalinkCreator }) =>
                         empty={!hasThreads}
                     />
                 }
+                id="thread-panel"
                 className="mx_ThreadPanel"
+                ariaLabelledBy="thread-panel-tab"
+                role="tabpanel"
                 onClose={onClose}
                 withoutScrollContainer={true}
                 ref={card}