refactor: Spaces UX improvements

assets/l10n/intl_ja.arb

@@ -1856,8 +1856,6 @@
     "@youRejectedTheInvitation": {},
     "screenSharingDetail": "FuffyChatで画面を共有しています",
     "@screenSharingDetail": {},
-    "enterASpacepName": "スペース名を入力してください",
-    "@enterASpacepName": {},
     "homeserver": "ホームサーバー",
     "@homeserver": {},
     "scanQrCode": "QRコードをスキャン",
@@ -2244,8 +2242,6 @@
     },
     "banUserDescription": "",
     "@banUserDescription": {},
-    "requests": "",
-    "@requests": {},
     "widgetEtherpad": "",
     "@widgetEtherpad": {},
     "removeDevicesDescription": "",