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/views/right_panel/BaseCard.tsx

@@ -26,8 +26,12 @@ import { CardContext } from "./context";
 
 interface IProps {
     header?: ReactNode | null;
+    hideHeaderButtons?: boolean;
     footer?: ReactNode;
     className?: string;
+    id?: string;
+    role?: "tabpanel";
+    ariaLabelledBy?: string;
     withoutScrollContainer?: boolean;
     closeLabel?: string;
     onClose?(ev: ButtonEvent): void;
@@ -62,6 +66,10 @@ const BaseCard: React.FC<IProps> = forwardRef<HTMLDivElement, IProps>(
             onClose,
             onBack,
             className,
+            id,
+            ariaLabelledBy,
+            role,
+            hideHeaderButtons,
             header,
             footer,
             withoutScrollContainer,
@@ -100,13 +108,31 @@ const BaseCard: React.FC<IProps> = forwardRef<HTMLDivElement, IProps>(
             children = <AutoHideScrollbar>{children}</AutoHideScrollbar>;
         }
 
+        let headerButtons: React.ReactElement | undefined;
+        if (!hideHeaderButtons) {
+            headerButtons = (
+                <>
+                    {backButton}
+                    {closeButton}
+                </>
+            );
+        }
+
+        const shouldRenderHeader = header || !hideHeaderButtons;
+
         return (
             <CardContext.Provider value={{ isCard: true }}>
-                <div className={classNames("mx_BaseCard", className)} ref={ref} onKeyDown={onKeyDown}>
-                    {header !== null && (
+                <div
+                    id={id}
+                    aria-labelledby={ariaLabelledBy}
+                    role={role}
+                    className={classNames("mx_BaseCard", className)}
+                    ref={ref}
+                    onKeyDown={onKeyDown}
+                >
+                    {shouldRenderHeader && (
                         <div className="mx_BaseCard_header">
-                            {backButton}
-                            {closeButton}
+                            {headerButtons}
                             <div className="mx_BaseCard_headerProp">{header}</div>
                         </div>
                     )}