Add ability to `Add comment now` in middle of a review when editing a pending comment
From [feedback issue](https://gitlab.com/gitlab-org/gitlab/-/issues/368799#note_1048213625) #### Issue We removed the option to `Add comment now` on every single pending comment to reduce information overload. However, sometimes a user may add a comment to a review and then realize they want to "add comment now." At this time, you can no longer do that. #### Proposal ##### Editing a comment - Add option to `Add comment now` | Current | Proposed | | ------ | ------ | | ![before_--_comment](/uploads/c71ea1a993e929a580d647c65d681eb0/before_--_comment.png) | ![after_--_comment](/uploads/39869dd7bef4115e171a35eda833e8ff/after_--_comment.png) | ##### [Editing threaded comment (with resolve option)](https://gitlab.com/gitlab-org/gitlab/-/issues/250660) - Remove `Comment and resolve thread` (I'm not sure it's working as intended anyway :thinking:) - Add `Add comment now` - Include `Resolve thread` checkbox (which should retain previous selection; ie if user selected `Resolve` when making the original threaded comment, it should still be `checked` in edit mode) | Current | Proposed | | ------ | ------ | | ![before--thread](/uploads/115c7725a26ad54085d86f470456fb70/before--thread.png) | ![After_--_thread](/uploads/cb55314fdf7faca0d4d551b32fa7de8c/After_--_thread.png) | #### Availability and Testing - We currently have an end to end test for reviews with multiple comments `qa/qa/specs/features/browser_ui/3_create/merge_request/suggestions/batch_suggestion_spec.rb`. Recommendation is to modify this test or create a new test, which covers the functionality of being able to add a comment immediately while a review is ongoing. - Replace test code (if any) associated with `Comment and resolve thread` button with check box select->Save comment button click.
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