(WIP) Diff Comment Reply Pop Up Dialog

Review Request #10315 — Created Nov. 8, 2018 and updated — Latest diff uploaded

Review Board
reviewboard, students

Set up the view class for handling the popup dialog.
Need to remove old tooltip popup.
Handling basic popup functionality.
Handles comment selection from commentlist.
Selecting a comment will expand it to fill the dialog.
Replying in the dialog box (WIP) - Text field with action
buttons implemented, needs styling and reply posting.
Have issuebar inserted into comment when expanded.
Need to query user data from a comment to get avatars.
UI Design Aesthetics (WIP).