[BUGFIX] Recalculate context-menu position after data population

With #103197, a loading indicator was added to the context menus,
which rendered a stub context-menu.
The position of the context-menu needs to be recalculated once the
data has been loaded (the context-menu becomes taller) in order to
avoid rendering outside the visible window area.

Releases: main, 12.4
Resolves: #103382
Related: #103197
Related: #103294
Change-Id: I75e3659c619d4b98c773faa4dab9bbf184471065
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83450


Tested-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Sven Juergens <typo3@blue-side.de>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Kevin Appelt <kevin.appelt@icloud.com>
Tested-by: Kevin Appelt <kevin.appelt@icloud.com>
Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>