Reposition popover helper after each sidebar panel update
Reposition popover helper after each sidebar panel update

This ensures that all anchor elements are already loaded
and popover can be repositioned properly including the
case when the global theme is being changed.

Fixed: chromium:1257505
Change-Id: I1b8a252c0ea4b832bcc0baf491757634c5a0e69f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3217624
Commit-Queue: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>
Reviewed-by: Mathias Bynens <17a2cbc4e33156874a9862b0f530521117e66a3d@chromium.org>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend