Before this commit, these doc strings were unassociated, which means
that the can appear at random places. They are now associated with
their namespace an class.
* [TD]allow DrawViewAnno to be attached to another view
* [TD]allow image and spreadsheet attach to view
* [TD]ensure correct parent in scene
* [TD]refactor command helpers to separate file
- gathering the helpers in one place
- helper redundancy to be address in another change
* [TD]create symbol, spreadsheet, image with parent
* [TD]fix claimChildren for some views
- also includes many lint fixes
