Sync breakpoints between Debugger tab and VSCode

Right now, setting a breakpoint in the Debugger tab does not set a breakpoint in VSCode. But when I set a breakpoint in VSCode it _does_ show up in the Debugger tab. Is there a way to better keep breakpoints in sync?

Start at the breakpoint flows between the Debugger tab and VSCode, reproducing the one-way behavior described in the issue. Trace the existing VSCode-to-Debugger synchronization and identify the corresponding reverse path; done means breakpoints set in either surface appear in the other.

Written by the indexing model from the issue text.