Alert container background removed

[vlaucht]

Pull Request for Issue #26817

Summary of Changes

Background of system message container has been removed

Testing Instructions

apply PR
run npm i
Do something that will create multiple alerts. eg install a patch with com_patchtesters

Expected result

Background of container should be transparent

Documentation Changes Required

none

[dgrammatiko]

Can you please make these changes against #26077
You see there is a very wrong approach considering the css as a monolith and also it’s against the joomla’s intended way...

[BertaOctech]

I have tested this item 🔴 unsuccessfully on dbecdc4

I applied a random patch to observe the effect and the revert the patch. Infact the space between messages was not transparent
Then I applied the patch and applied a second patch to observe the messages.

I am afraid nothing changed.

I am using Firefox on suseLinux

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/26855.}

[Quy]

@dgrammatiko Is this still a valid fix?

[dgrammatiko]

@Quy yes! but the PR needs to be updated (we moved the alert code to it's own file, the comment I made above)

[Quy]

Please test PR #27394