Update to 1.64 / 1.64.1 breaks Add/Edit function break point

[jhoneill]

Does this issue occur when all extensions are disabled?: Can not display the parts of the debug pane when all disabled.

• VS Code Version: 1.64.1
• OS Version: Windows 10.0.19042

Steps to Reproduce:
(this is with the PowerShell extension but I do not believe that it is extension specific)

1. Select debug on the activity bar
2. At the bottom of the side bar if Breakpoints is not expanded click the > symbol
3. Hover over Breakpoints, and click the + for Add function breakpoint. The input box no longer appears and a blank function break point appears
4. Right click the new blank break point and choose Edit Function BreakPoint ... No edit box appears.

[gjsjohnmurray]

/duplicate of #142010 and will be fixed in 1.64.2

[jhoneill]

@gjsjohnmurray Thanks. When I searched for breakpoint I didn't find that one - sorry for the duplicate.