Rename Flag.reason and details to tyype and reason.
Change Flag to PostActionDto[PAP.Flag].
Change EditApp to PostActionDto[PAP.EditApp], remove EditApp.result.
Remove PostActionDtoOld and PostActionOld.
Fix broken E2E test.
Rename PostActionDto to RawPostAction.
Move class PostActionPayload to separate file.
Rename actionDto to rawAction

- Rename PostAction.actionDto to rawAction.
- Rename PageParts.actionDtos to rawActions.
- Rename creationPostActionDto to creationAction
- Rename some local variables.
Merge branch 'topic-finish-post-action-refactoring'.