Backoffice: CTRL+Click to open in a new tab should work on Linux (closes #21009) (#21027)

* fix: uses 'href' as property instead of attribute

* build: runs on PR to release branches

* Content references: Avoid requesting references for content that is not yet persisted server side (#21035)

* Avoid requesting references for content that is not yet persisted server side.

* Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* refactor to use condition

* revert

* danish translations

* da translation

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Niels Lyngsø <niels.lyngso@gmail.com>

* fix: CTRL+Click now opens links in new tab on Linux

The router's anchor click handler incorrectly assumed non-Windows
platforms use Meta (⌘) key for "open in new tab". This broke
CTRL+Click on Linux, which uses CTRL like Windows.

Changed detection from "is Windows" to "is Mac" so Linux correctly
uses CTRL+Click while Mac continues to use Meta+Click.

Also replaced deprecated navigator.platform with navigator.userAgent.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Andy Butland <abutland73@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Niels Lyngsø <niels.lyngso@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/azure-backoffice.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - release/*
       - v*/dev
       - v*/main
     paths:
@@ -15,6 +16,7 @@ on:
     types: [opened, synchronize, reopened, closed]
     branches:
       - main
+      - release/*
       - v*/dev
       - v*/main
   workflow_dispatch: