Add ToolControlRendererTest for ToolControlRenderer

[vogella]

Summary

Adds unit tests for ToolControlRenderer covering its core behavior:

• Widget creation – verifies a widget is created for a MToolControl contribution
• Empty contribution – verifies widget is null when the contribution creates no SWT children
• HIDDEN_EXPLICITLY tag – verifies visibility is toggled when the tag is added/removed
• HIDEABLE context menus – verifies each HIDEABLE control gets its own independent menu instance

No production code changes. This is a test-only PR.

Test plan

• Run mvn clean verify -pl :org.eclipse.e4.ui.tests -Pbuild-individual-bundles -Dtest=ToolControlRendererTest — all 5 tests must pass

[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:

examples/org.eclipse.jface.examples.databinding/META-INF/MANIFEST.MF
examples/org.eclipse.ui.examples.javaeditor/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 6279c5b9ddf68b0659fbd99c37f70d1b3ee7a2b1 Mon Sep 17 00:00:00 2001
From: Eclipse Platform Bot <platform-bot@eclipse.org>
Date: Tue, 14 Apr 2026 13:29:26 +0000
Subject: [PATCH] Version bump(s) for 4.40 stream


diff --git a/examples/org.eclipse.jface.examples.databinding/META-INF/MANIFEST.MF b/examples/org.eclipse.jface.examples.databinding/META-INF/MANIFEST.MF
index 26664654b7..98f5daa860 100644
--- a/examples/org.eclipse.jface.examples.databinding/META-INF/MANIFEST.MF
+++ b/examples/org.eclipse.jface.examples.databinding/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.jface.examples.databinding
-Bundle-Version: 1.5.0.qualifier
+Bundle-Version: 1.5.100.qualifier
 Eclipse-BundleShape: dir
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/examples/org.eclipse.ui.examples.javaeditor/META-INF/MANIFEST.MF b/examples/org.eclipse.ui.examples.javaeditor/META-INF/MANIFEST.MF
index 70f52c76fd..29a64b5365 100644
--- a/examples/org.eclipse.ui.examples.javaeditor/META-INF/MANIFEST.MF
+++ b/examples/org.eclipse.ui.examples.javaeditor/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.ui.examples.javaeditor; singleton:=true
-Bundle-Version: 3.5.0.qualifier
+Bundle-Version: 3.5.100.qualifier
 Bundle-Activator: org.eclipse.ui.examples.javaeditor.JavaEditorExamplePlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-- 
2.53.0

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

[github-actions]

Test Results

   852 files  ± 0     852 suites  ±0   55m 39s ⏱️ + 1m 22s
 7 899 tests + 5   7 656 ✅ + 5  243 💤 ±0  0 ❌ ±0 
20 199 runs  +15  19 544 ✅ +15  655 💤 ±0  0 ❌ ±0 

Results for commit 2f52816. ± Comparison against base commit 1146cf2.

♻️ This comment has been updated with latest results.