Gravity Flow 2.9.6

Added the Multi-User field.
Added the filter gravityflow_step_status_evaluation_approval to allow the status evaluation of approval step to check custom logic (X of Y approvals).
Added the "Display all fields except selected" choice to the Display Fields setting.
Added searching to the lists of assignees.
Updated the Sprout Invoices step to support the new Sprout Invoices + Gravity Forms add-on.
Updated the existing choice labels in the Display Fields setting to "Display all fields" and "Hide all fields except selected".
Fixed editable Post Image field not being populated with the current entry value on the User Input step.
Fixed editable Post Image field value retaining the previous image URL on entry update if the step failed validation.
Fixed status export .csv to include duration as a separate column so it is consistent with status export table info.
Fixed a PHP warning for the Discussion field.
Fixed an issue with the approval step for assignees added via custom code.
Fixed some merge tags such as {created_by} being replaced in assignee notifications before the entry was available.

-Fixed editable Post Category field not being populated with the current entry value on the User Input step.
-Fixed an issue which prevents the rendering of certain merge tags e.g. {workflow_form_submission_link} in extensions and custom code.

--Added support for the Gravity Perks Nested Forms add-on.
--Added the current step as parameters to the gravityflow_feedback_approval_token and gravityflow_feedback_approval filters.
--Added the filter gravityflow_feedback_cancel_workflow to allow the user feedback to be modified when the workflow is cancelled using the cancel workflow link.
--Added the filter gravityflow_inbox_search_criteria to allow the search criteria to be modify.
--Added the filter gravityflow_assignee_choices to allow the list of assignee choices to be modified in the step settings.
--Added the filter gravityflow_step_schedule_timestamp to allow the scheduled start of steps to apply custom logic (business hours, delay specific entries, etc)
--Added the filter gravityflow_event_limit_activity_page to allow the activity page to display custom amount of events
--Added the filter gravityflow_discussion_items_display_toggle to allow view more / less effect to be modified per discussion field
--Added the filter gravityflow_inbox_paging to inbox page to enable control of pagination options
--Added the filter gravityflow_step_status_webhook to enable custom logic at conclusion of outbound webhook step processing
--Added the filter gravityflow_response_message_webhook to enable customization of timeline note for an outbound webhook step
--Added the Step ID # to workflow settings list. Accessible by mouseover in the row actions
--Added the Step ID # to sub-title of edit step screen for existing steps
--Updated the Status Page export to match table display and run gravityflow_field_value_status_table filter
--Updated the Sliced Invoices integration.
--Updated discussion field to display the view more / less effect on all step types for status and inbox pages. Previously limited to user input edit field.
--Updated the Outgoing Webhook Step to handle multiple response codes appropriate statuses: 2xx (complete), 4xx (error_client), 5xx (error_server), other (error)
--Fixed an issue where, in some situations, getting the next step was not using the latest version of the entry.
--Fixed an issue where calculated product fields hidden by conditional logic could appear in order summary when the entry is updated on the User Input step.
--Fixed an issue where feeds with conditional logic can block the progress of the workflow if the conditional is not met.
--API: Updated the way assignees are handled to allow the base assignee class to be extended so new types of assignees can be created.