Add toggle for versioned autosave, formatting

-Add a toggle for versioned autosaves, checkbox in Performance->Autosave section.
-Make the timestamping easier to read.
-Make timestamp not use miliseconds. (Overkill.)
-Formatting fixes.

Author: Jan125

include/SetupDialog.h

@@ -93,6 +93,7 @@ private slots:
 	void resetAutoSave();
 	void toggleAutoSave(bool enabled);
 	void toggleRunningAutoSave(bool enabled);
+	void toggleVersionedAutoSave(bool enabled);
 	void toggleSmoothScroll(bool enabled);
 	void toggleAnimateAFP(bool enabled);
 	void vstEmbedMethodChanged();
@@ -156,10 +157,12 @@ private slots:
 	int m_saveInterval;
 	bool m_enableAutoSave;
 	bool m_enableRunningAutoSave;
+	bool m_enableVersionedAutoSave;
 	QSlider * m_saveIntervalSlider;
 	QLabel * m_saveIntervalLbl;
 	QCheckBox * m_autoSave;
 	QCheckBox * m_runningAutoSave;
+	QCheckBox * m_versionedAutoSave;
 	bool m_smoothScroll;
 	bool m_animateAFP;
 	QLabel * m_vstEmbedLbl;

src/gui/MainWindow.cpp

@@ -1367,9 +1367,8 @@ void MainWindow::browseHelp()
 
 void MainWindow::autoSave()
 {
-	QString autoSaveVersionedName = Engine::getSong()->projectFileName();
 
-	if( Engine::getSong()->isModifiedAutosave() &&
+	if ( Engine::getSong()->isModifiedAutosave() &&
 		!Engine::getSong()->isExporting() &&
 		!Engine::getSong()->isLoadingProject() &&
 		!RemotePluginBase::isMainThreadWaiting() &&
@@ -1380,9 +1379,16 @@ void MainWindow::autoSave()
 	{
 		//Recovery file is still needed for post-crash recovery dialog.
 		Engine::getSong()->saveProjectFile(ConfigManager::inst()->recoveryFile());
-		if( Engine::getSong()->projectFileName() != "" )
+		if (Engine::getSong()->projectFileName() != "" &&
+			ConfigManager::inst()->value( "ui", "enableversionedautosave" ).toInt())
 		{
-			Engine::getSong()->saveProjectFile( autoSaveVersionedName.section('.', 0, 0).append(".").append("autosave").append(".").append(QDateTime::currentDateTime().toString("dd-MM-yyyy-hh-mm-ss-zzz")).append(".").append(autoSaveVersionedName.section('.', -1)) );
+			QString currentProjectName = Engine::getSong()->projectFileName();
+			QString autoSaveTimestamp = QDateTime::currentDateTime().toString("dd-MM-yyyy-hh-mm-ss");
+			QString autoSaveVersionedName = currentProjectName.section('.', 0, 0).append(".autosave.")	//filename.autosave.
+											.append(autoSaveTimestamp).append(".")						//timestamp.
+											.append(currentProjectName.section('.', -1));				//extension
+
+			Engine::getSong()->saveProjectFile(autoSaveVersionedName);
 		}
 		Engine::getSong()->setModifiedAutosave(false);
 		autoSaveTimerReset();  // Reset timer

src/gui/modals/SetupDialog.cpp

@@ -130,6 +130,8 @@ SetupDialog::SetupDialog(ConfigTab tab_to_open) :
 			"ui", "enableautosave", "1").toInt()),
 	m_enableRunningAutoSave(ConfigManager::inst()->value(
 			"ui", "enablerunningautosave", "0").toInt()),
+	m_enableVersionedAutoSave(ConfigManager::inst()->value(
+			"ui", "enableversionedautosave", "0").toInt()),
 	m_smoothScroll(ConfigManager::inst()->value(
 			"ui", "smoothscroll").toInt()),
 	m_animateAFP(ConfigManager::inst()->value(
@@ -400,8 +402,12 @@ SetupDialog::SetupDialog(ConfigTab tab_to_open) :
 	m_runningAutoSave = addCheckBox(tr("Allow autosave while playing"), autoSaveBox, autoSaveLayout,
 		m_enableRunningAutoSave, SLOT(toggleRunningAutoSave(bool)), false);
 
+	m_versionedAutoSave = addCheckBox(tr("Create timestamped autosaves"), autoSaveBox, autoSaveLayout,
+		m_enableVersionedAutoSave, SLOT(toggleVersionedAutoSave(bool)), false);
+
 	m_saveIntervalSlider->setEnabled(m_enableAutoSave);
 	m_runningAutoSave->setVisible(m_enableAutoSave);
+	m_versionedAutoSave->setVisible(m_enableAutoSave);
 
 
 	// UI effect vs. performance tab.
@@ -989,6 +995,8 @@ void SetupDialog::accept()
 					QString::number(m_enableAutoSave));
 	ConfigManager::inst()->setValue("ui", "enablerunningautosave",
 					QString::number(m_enableRunningAutoSave));
+	ConfigManager::inst()->setValue("ui", "enableversionedautosave",
+					QString::number(m_enableVersionedAutoSave));
 	ConfigManager::inst()->setValue("ui", "smoothscroll",
 					QString::number(m_smoothScroll));
 	ConfigManager::inst()->setValue("ui", "animateafp",
@@ -1166,6 +1174,11 @@ void SetupDialog::toggleRunningAutoSave(bool enabled)
 	m_enableRunningAutoSave = enabled;
 }
 
+void SetupDialog::toggleVersionedAutoSave(bool enabled)
+{
+	m_enableVersionedAutoSave = enabled;
+}
+
 
 void SetupDialog::resetAutoSave()
 {