[WIP] Allowing the Comment Dialog to be Embeddable

Review Request #10341 — Created Dec. 3, 2018 and updated — Latest diff uploaded


Review Board


Currently the entirety of the Comment Dialog lives inside of
RB.CommentDialogView. This patch will extract the internals of the
dialog, such as the text area and UI for checkboxes, and place them
inside of RB.CommentPaneView.

So far I have rendered a new view inside of the original
RB.CommentDialogView file, CommentPaneView, in order to get
comfortable with Backbone Views. I plan on filling out this new view
entirely before moving the Backbone view inside of a new file.