Support for creator/owner power level (#30525)

* Support for creator/owner power level

This just shows them as 'Owner' in the list.

* Add test for owner level

src/components/viewmodels/memberlist/tiles/MemberTileViewModel.tsx

@@ -31,11 +31,13 @@ export interface MemberTileViewState extends MemberTileViewModelProps {
 }
 
 export enum PowerStatus {
+    Creator = "creator",
     Admin = "admin",
     Moderator = "moderator",
 }
 
 const PowerLabel: Record<PowerStatus, TranslationKey> = {
+    [PowerStatus.Creator]: _td("power_level|creator"),
     [PowerStatus.Admin]: _td("power_level|admin"),
     [PowerStatus.Moderator]: _td("power_level|moderator"),
 };
@@ -115,6 +117,7 @@ export function useMemberTileViewModel(props: MemberTileViewModelProps): MemberT
     const name = props.member.name;
 
     const powerStatusMap = new Map([
+        [Infinity, PowerStatus.Creator],
         [100, PowerStatus.Admin],
         [50, PowerStatus.Moderator],
     ]);

src/components/views/settings/tabs/room/RolesRoomSettingsTab.tsx

@@ -348,10 +348,7 @@ export default class RolesRoomSettingsTab extends React.Component<IProps, RolesR
             powerLevelDescriptors.users_default.defaultValue,
         );
 
-        let currentUserLevel = userLevels[client.getUserId()!];
-        if (currentUserLevel === undefined) {
-            currentUserLevel = defaultUserLevel;
-        }
+        const currentUserLevel = room.getMember(client.getSafeUserId())?.powerLevel ?? defaultUserLevel;
 
         this.populateDefaultPlEvents(
             eventsLevels,