[FW][FIX] point_of_sale: display popups on top

[fw-bot]

Prior to this commit, popups would not appear on the login page due to its z-index being set to 1000. This commit resolves the issue by setting the staring z-index of the popups to 10000, ensuring that popups are displayed on top.

opw-3930943

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Forward-Port-Of: #166016

[robodoo]

Pull request status dashboard.

[fw-bot]

@pedrambiria @caburj cherrypicking of pull request #166016 failed.

stdout:

CONFLICT (modify/delete): addons/point_of_sale/static/src/app/popup/popup_service.js deleted in HEAD and modified in bc0bbed10aa5 ([FIX] point_of_sale: display popups on top).  Version bc0bbed10aa5 ([FIX] point_of_sale: display popups on top) of addons/point_of_sale/static/src/app/popup/popup_service.js left in tree.

stderr:

22:03:14.528026 git.c:463               trace: built-in: git cherry-pick bc0bbed10aa56a4d478c2c47e944fd4719af77df
error: could not apply bc0bbed10aa5... [FIX] point_of_sale: display popups on top
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
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status:

Either perform the forward-port manually (and push to this branch, proceeding as usual) or close this PR (maybe?).

In the former case, you may want to edit this PR message as well.

⚠️ after resolving this conflict, you will need to merge it via @robodoo.

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port

[pedrambiria]

It's not an issue in this version