Proposal: pin specific thread(s) when debugging

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> # Background Multithreading is getting trend these days. Each debug session creates a bunch of independent PCs walking around the code. However, VSCode seems to lack the ability to focus on just a few threads rather than all threads in a process. # Pains Each time I want to perform a step-through to a PC, I have to find that thread from Debug->Call Stack->specific thread that marked "Paused on step". And then I hover the curser on the tiny "step-in" icon and carefully press the button. When I settle down my mouse, the stack frame suddenly shows up at the other location! I have to carefully redo that nonsense. Sometimes, the stack frame stays relatively stable, but after I get used to the click-click muscle inertia, the stack relocates and fools me clicking the wrong frame! # Suggestion Please make those frames stable or reserve shortcuts for frame-debugging. It would be a plus by supporting users to pin one or more interested frames. Those shortcuts should only affect those pinned frames. The pinned frames should be sorted in pin-time order.