Qt: Remove What's This icon from dialogs

CHANGES

@@ -72,6 +72,7 @@ Misc:
  - Feature: Switch from ImageMagick to FFmpeg for GIF generation
  - OpenGL: Only resize textures when needed
  - GBA BIOS: Fix clobbered registers in CpuSet (fixes mgba.io/i/1531)
+ - Qt: Remove What's This icon from dialogs
 
 0.7.3: (2019-09-15)
 Emulation fixes:

src/platform/qt/ArchiveInspector.cpp

@@ -10,7 +10,7 @@
 using namespace QGBA;
 
 ArchiveInspector::ArchiveInspector(const QString& filename, QWidget* parent)
-	: QDialog(parent)
+	: QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 {
 	m_ui.setupUi(this);
 	connect(m_ui.archiveView, &LibraryController::doneLoading, [this]() {

src/platform/qt/IOViewer.cpp

@@ -1024,7 +1024,7 @@ const QList<IOViewer::RegisterDescription>& IOViewer::registerDescriptions() {
 }
 
 IOViewer::IOViewer(std::shared_ptr<CoreController> controller, QWidget* parent)
-	: QDialog(parent)
+	: QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 	, m_controller(controller)
 {
 	m_ui.setupUi(this);

src/platform/qt/PlacementControl.cpp

@@ -14,7 +14,7 @@
 using namespace QGBA;
 
 PlacementControl::PlacementControl(std::shared_ptr<CoreController> controller, QWidget* parent)
-	: QDialog(parent)
+	: QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 	, m_controller(controller)
 {
 	m_ui.setupUi(this);

src/platform/qt/PrinterView.cpp

@@ -13,7 +13,7 @@
 using namespace QGBA;
 
 PrinterView::PrinterView(std::shared_ptr<CoreController> controller, QWidget* parent)
-	: QDialog(parent)
+	: QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 	, m_controller(controller)
 {
 	m_ui.setupUi(this);