Give the toolbar and gesture settings tests their own settings scope

tst_toolbarsettings, tst_diagramtoolbarsettings and tst_gesturesettings
never set an organization or application name. On macOS and Linux,
QSettings then falls back to an "Unknown Organization" file, so the
tests pass there. On Windows it has no registry key: every write is
dropped and every read gives the default, and nine checks fail.

Each test now sets its own organization and application name in
initTestCase(), as tst_scriptingsetting and tst_sheetbackgroundsetting
already do. That also keeps the tests away from the settings of the
account that runs them.

Tests only; no change to the app or its files.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/qttest/tst_diagramtoolbarsettings.cpp

@@ -21,6 +21,7 @@
 
 #include <QAction>
 #include <QComboBox>
+#include <QCoreApplication>
 #include <QListWidget>
 #include <QPushButton>
 #include <QSettings>
@@ -86,6 +87,11 @@ private slots:
 	void initTestCase()
 	{
 		QStandardPaths::setTestModeEnabled(true);
+			//A scope of this test's own. Without an organization name,
+			//QSettings on Windows has no registry key: it drops every
+			//write and reads only defaults.
+		QCoreApplication::setOrganizationName(QStringLiteral("QElectroTech-tst_diagramtoolbarsettings"));
+		QCoreApplication::setApplicationName(QStringLiteral("tst_diagramtoolbarsettings"));
 		clearSettings();
 			//A few of the diagram editor's commands, as it registers them
 		for (const QString &id : {QStringLiteral("diagrameditor.copy"),

tests/qttest/tst_gesturesettings.cpp

@@ -22,6 +22,7 @@
 
 #include <QAction>
 #include <QComboBox>
+#include <QCoreApplication>
 #include <QDropEvent>
 #include <QListWidget>
 #include <QMainWindow>
@@ -64,6 +65,11 @@ private slots:
 	void initTestCase()
 	{
 		QStandardPaths::setTestModeEnabled(true);
+			//A scope of this test's own. Without an organization name,
+			//QSettings on Windows has no registry key: it drops every
+			//write and reads only defaults.
+		QCoreApplication::setOrganizationName(QStringLiteral("QElectroTech-tst_gesturesettings"));
+		QCoreApplication::setApplicationName(QStringLiteral("tst_gesturesettings"));
 		QSettings().remove(QStringLiteral("diagrameditor"));
 		addCommand(QStringLiteral("diagrameditor.copy"), QStringLiteral("Copier"));
 		addCommand(QStringLiteral("diagrameditor.cut"), QStringLiteral("Couper"));

tests/qttest/tst_toolbarsettings.cpp

@@ -20,6 +20,7 @@
 
 #include <QCheckBox>
 #include <QComboBox>
+#include <QCoreApplication>
 #include <QDockWidget>
 #include <QMainWindow>
 #include <QSettings>
@@ -48,6 +49,11 @@ private slots:
 	void initTestCase()
 	{
 		QStandardPaths::setTestModeEnabled(true);
+			//A scope of this test's own. Without an organization name,
+			//QSettings on Windows has no registry key: it drops every
+			//write and reads only defaults.
+		QCoreApplication::setOrganizationName(QStringLiteral("QElectroTech-tst_toolbarsettings"));
+		QCoreApplication::setApplicationName(QStringLiteral("tst_toolbarsettings"));
 		QSettings().remove(QStringLiteral("toolbars"));
 
 		m_window = new QMainWindow();