Workbench navigation commands stop working inside WebView when switching to another editor and back

Issue Type: <b>Bug</b> CC @mjbvz Followup to #137167 which is still reproducible for me ## Steps to reproduce - Open a vanilla VSCode with no settings and extensions: ```sh code --user-data-dir /tmp/vscode-repro-nav --disable-extensions ``` - Set the following keybindings: ```json [ { "key": "f1", "command": "workbench.action.navigateLeft" }, { "key": "f2", "command": "workbench.action.navigateRight" } ] ``` - Open some file, say `test.py` - Use `workbench.action.splitEditorRight` to split the editor to the right - Use `update.showCurrentReleaseNotes` to open the Release Notes WebView - Click with the mouse inside the Release Notes WebView - Type <kbd>F1</kbd> from the WebView to navigate to the left editor: it works following 6e5b172 - Navigate in the **right** editor group (where the Release Notes WebView are open) to the file `test.py` with the keyboard (for example using <kbd>Ctrl+Tab</kbd>) - Navigate back to the Release Notes WebView with the keyboard (for example using <kbd>Ctrl+Tab</kbd>) - Type <kbd>F1</kbd> from the WebView to navigate to the left editor: it no longer works VS Code version: Code 1.67.2 (c3511e6c69bb39013c4a4b7b9566ec1ca73fc4d5, 2022-05-17T18:23:40.286Z) OS version: Linux x64 5.17.11 Restricted Mode: No <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-7820X CPU @ 3.60GHz (16 x 3600)| |GPU Status|2d_canvas: enabled<br>canvas_oop_rasterization: disabled_off<br>direct_rendering_display_compositor: disabled_off_ok<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>oop_rasterization: enabled<br>opengl: enabled_on<br>rasterization: enabled_force<br>raw_draw: disabled_off_ok<br>skia_renderer: enabled_on<br>video_decode: disabled_software<br>video_encode: disabled_software<br>vulkan: disabled_off<br>webgl: enabled<br>webgl2: enabled| |Load (avg)|3, 2, 2| |Memory (System)|94.00GB (15.81GB free)| |Process Argv|--enable-gpu-rasterization --user-data-dir /tmp/vscode-r…