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

Issue Type: Bug

CC @mjbvz Followup to #137167 which is still reproducible for me

Steps to reproduce

• Open a vanilla VSCode with no settings and extensions:

code --user-data-dir /tmp/vscode-repro-nav --disable-extensions

• Set the following keybindings:

[
  {
    "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 F1 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 Ctrl+Tab)
• Navigate back to the Release Notes WebView with the keyboard (for example using Ctrl+Tab)
• Type F1 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

Item	Value
CPUs	Intel(R) Core(TM) i7-7820X CPU @ 3.60GHz (16 x 3600)
GPU Status	2d_canvas: enabledcanvas_oop_rasterization: disabled_offdirect_rendering_display_compositor: disabled_off_okgpu_compositing: enabledmultiple_raster_threads: enabled_onoop_rasterization: enabledopengl: enabled_onrasterization: enabled_forceraw_draw: disabled_off_okskia_renderer: enabled_onvideo_decode: disabled_softwarevideo_encode: disabled_softwarevulkan: disabled_offwebgl: enabledwebgl2: enabled
Load (avg)	3, 2, 2
Memory (System)	94.00GB (15.81GB free)
Process Argv	--enable-gpu-rasterization --user-data-dir /tmp/vscode-repro-nav --disable-extensions --crash-reporter-id 1a24c498-5487-42be-8c72-40410e66ca6b
Screen Reader	no
VM	0%
DESKTOP_SESSION	custom
XDG_CURRENT_DESKTOP	Xsession
XDG_SESSION_DESKTOP	custom
XDG_SESSION_TYPE	x11

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