Implement visibility tracking for regular toolbar items

[laeubi]

Fix #3513

[github-actions]

Test Results

 3 018 files  ±0   3 018 suites  ±0   2h 8m 49s ⏱️ - 4m 11s
 8 237 tests +1   7 988 ✅ +1  249 💤 ±0  0 ❌ ±0 
23 631 runs  +3  22 837 ✅ +3  794 💤 ±0  0 ❌ ±0 

Results for commit 1701936. ± Comparison against base commit 1cffef2.

♻️ This comment has been updated with latest results.

[eclipse-platform-bot]

This pull request changes some projects for the first time in this development cycle.
Therefore the following files need a version increment:

bundles/org.eclipse.e4.ui.workbench.renderers.swt/META-INF/MANIFEST.MF
tests/org.eclipse.e4.ui.tests/META-INF/MANIFEST.MF

An additional commit containing all the necessary changes was pushed to the top of this PR's branch. To obtain these changes (for example if you want to push more changes) either fetch from your fork or apply the git patch.

Git patch

From 38ba10067121fb95d294ce9482e4eda1be272df9 Mon Sep 17 00:00:00 2001
From: Eclipse Platform Bot <platform-bot@eclipse.org>
Date: Wed, 3 Dec 2025 11:09:41 +0000
Subject: [PATCH] Version bump(s) for 4.39 stream


diff --git a/bundles/org.eclipse.e4.ui.workbench.renderers.swt/META-INF/MANIFEST.MF b/bundles/org.eclipse.e4.ui.workbench.renderers.swt/META-INF/MANIFEST.MF
index 249542c521..ca4f9ad426 100644
--- a/bundles/org.eclipse.e4.ui.workbench.renderers.swt/META-INF/MANIFEST.MF
+++ b/bundles/org.eclipse.e4.ui.workbench.renderers.swt/META-INF/MANIFEST.MF
@@ -1,7 +1,7 @@
 Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-SymbolicName: org.eclipse.e4.ui.workbench.renderers.swt;singleton:=true
-Bundle-Version: 0.16.1000.qualifier
+Bundle-Version: 0.16.1100.qualifier
 Bundle-Name: %pluginName
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/tests/org.eclipse.e4.ui.tests/META-INF/MANIFEST.MF b/tests/org.eclipse.e4.ui.tests/META-INF/MANIFEST.MF
index 39cd50d27c..db1fd1514d 100644
--- a/tests/org.eclipse.e4.ui.tests/META-INF/MANIFEST.MF
+++ b/tests/org.eclipse.e4.ui.tests/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.e4.ui.tests;singleton:=true
-Bundle-Version: 0.15.1000.qualifier
+Bundle-Version: 0.15.1100.qualifier
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
 Require-Bundle: org.eclipse.emf.ecore.xmi;bundle-version="2.4.0",
-- 
2.51.2

Further information are available in Common Build Issues - Missing version increments.