IBX-10639: Aligned the table header notice icon with its label

[tischsoic]

Question	Answer
JIRA issue	IBX-10639
Bug/Improvement	yes
New feature	no
Target version	v5.0, v6.0
BC breaks	no
Tests	no

Description

.ibexa-table-header__notice (the "You cannot delete …" line next to a list's List (n) headline) was a plain block: its <svg> sat inline on the text baseline while the block inherited line-height: 33px from .ibexa-table-header__headline, against its own 12px text. Made it a flex row centred on its content, with gap replacing the icon's margin-right and flex-shrink: 0 so the icon keeps its size next to a long message.

Root cause is IBX-10440, which grew the legacy icons from 16px to 20px without adjusting the surrounding layout — table_header.html.twig was never migrated to a design system component, so it kept the inline <svg>.

Measured on a 6.0 build, icon glyph centre vs label cap-height centre: 1.5px low → 0.5px (a correct DS button measures 0.2px on the same page).

table_header.html.twig is shared, so this covers the notice on every admin-ui list plus the ones rendered by product-catalog, site-factory, taxonomy and friends.

Counterpart PR: https://github.com/ibexa/product-catalog/pull/1585 (the catalog filters panel, same root cause).

For QA

Any list page whose bulk delete is partly blocked — e.g. Admin → Content types → Content type groups ("You cannot delete the disabled content type groups…"), Product Catalog → Attributes, Site Factory → Sites ("You cannot delete active sites."):

• the circled-question icon is vertically centred with the message, 8px before it;
• on a list where nothing blocks deletion the notice is still hidden entirely;
• the List (n) headline and the bulk actions on the right are unchanged.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud