Docassemble

Added
- The `edit_url_only` and `delete_url_only` parameters to the
`item_actions()` methods.
- The `url_only` parameter to the `add_action()` method.
- The `url_ask()` and `action_button_html()` functions.
Changed
- A `message` parameter to `add_action()` is now passed through
`word()`.
- Removed the new feature from 0.3.3 where interview answers are saved
before a `leave`.
- Different method of locking while copying playground modules.
Fixed
- Percent signs in `number` fields may have avoided validation.
- Database access for chat log not protected by locking.

Fixed
- Links not appearing in the inline navigation bar.
- Toggle button not present in the vertical navigation bar.

Added
- The ability to set a `read only` attribute on a `table` to indicate
that some rows cannot be deleted or edited.
Changed
- Editing a table will cause the definition of the `complete_element`
attribute, if any, to be recomputed after the `edit` attributes are
sought.
- Interview answers saved before a `leave`.
- Background task callbacks that raise exceptions will no longer save
interview answers.
Fixed
- Dependencies not being properly scanned from `setup.py` files.
- Review screen resume button that set variable had unicode instead of
boolean data type.
- Text was not scanned for emojis unless `images` were defined or the
`default icons` directive was set.
- The `get()` method of `DADict` did not work.
- Random errors where dictionary cannot be retrieved (potential fix).
- The `minimum_number` feature introduced in 0.3.2 did not work on
`table`s based on `DADict` objects.
- Elements could not be added through `add_action()` when the list was
empty.
- The `rows` directive of a table resulted in an error if the
expression used a compound operator (e.g., `+`).
- Changes to fields made by remote user not reflected in observer window.
- Back button did not work when remote controlling.
- Updated deprecated pandas code in the machine learning module.

Changed
- Using `table` with a `DADict` now sets `row_index` to the key and
`row_item` to the value, and `DADict`s can be edited using tables.
- No delete buttons on a `table` when deletion would cause the number
of items to fall below `minimum_number`.
- The `edit` option on a `table` can now use reference indices as well
as attributes.
- The default `message` for the `add_action()` method on a group is
"Add an item" if the group is empty.
- Clicking on a navigable section header empties the action queue,
ensuring that clicking "Resume" puts the user back in the interview,
rather than the screen they saw before they clicked the header.
Added
- The `delete buttons` option when using `edit` on a `table`.
- The `only_if_empty` option on the `reset_gathered()` method.
- The `slice` method of the `DADict` class.
- The `re_gather` attribute of groups to `basic-questions.yml`.
- The `follow up` option in a `review` block `fields`.
- The `reconsider()` function.
- The `preloaded modules` configuration directive.
- The `action_button_html()` function.
Fixed
- URL for restarting interview session conflicted with another URL
when user logged in.
- `table`s could not appear inside of `review` blocks because they
were always undefined.
- Navigable section headers not styled correctly.
- One of two processes simultaneously loading the playground modules at
same time could encounter an empty directory.
- Screen loads through `url_action_perform()` did not show the
spinner.
- Some thread variables were not reset between requests.
- The OCR background function did not work, so rolled back celery and
kombu to 4.1.0.

Changed
- When a variable is force-asked or the goal of an action and a
`question` is not found, no error will be raised. This facilitates
the use of optional follow-up questions in a `review` block.
Fixed
- Aliased template variables generated pickle errors.

Changed
- Upgraded OS from Debian stretch from Debian jessie. Upgraded pandoc
to version 2.3. LibreOffice upgraded to version in
stretch-backports. A system upgrade is required to realize these
changes.
- Setting a `minlength` on a `datatype: checkboxes` field turns off the
"None of the above" item.