Use SearchablePeopleList for add user to list dialog, replace old modal (#8212)

* move to dialogs dir

* make searchable people list more generic

* new list-add-remove-users dialog

* update header text

* fix header on android

* delete old modal

* reduce spacing on items

src/view/com/modals/Modal.tsx

@@ -17,7 +17,6 @@ import * as InviteCodesModal from './InviteCodes'
 import * as ContentLanguagesSettingsModal from './lang-settings/ContentLanguagesSettings'
 import * as PostLanguagesSettingsModal from './lang-settings/PostLanguagesSettings'
 import * as LinkWarningModal from './LinkWarning'
-import * as ListAddUserModal from './ListAddRemoveUsers'
 import * as UserAddRemoveListsModal from './UserAddRemoveLists'
 import * as VerifyEmailModal from './VerifyEmail'
 
@@ -61,9 +60,6 @@ export function ModalsContainer() {
   } else if (activeModal?.name === 'user-add-remove-lists') {
     snapPoints = UserAddRemoveListsModal.snapPoints
     element = <UserAddRemoveListsModal.Component {...activeModal} />
-  } else if (activeModal?.name === 'list-add-remove-users') {
-    snapPoints = ListAddUserModal.snapPoints
-    element = <ListAddUserModal.Component {...activeModal} />
   } else if (activeModal?.name === 'delete-account') {
     snapPoints = DeleteAccountModal.snapPoints
     element = <DeleteAccountModal.Component />