Co-authored-by: DeepBlueV7.X <nicolas.werner@hotmail.de>

fixes #1350

Log: according to the bug on https://bugreports.qt.io/browse/QTBUG-83972, The menu will always stay if not click one of the item. So I try to make a hack for it, wait qt solve it someday

Log: on wm like sway, it will cover the whole screen, and I cannot get
the file save dialog, then the program will stay there, I must kill it,
so I think hide it is better, because after, it will be closed

fixes #1301

* Pause ParticleEmitter when not in use

* Use timer instead to pause particle system

fixes #1260

Backtrace:

Thread 1 "nheko" received signal SIGSEGV, Segmentation fault.
containerWidget (w=w@entry=0x0) at /usr/src/debug/dev-qt/qtwidgets-5.15.7/qtbase-everywhere-src-5.15.7/src/widgets/styles/qstylesheetstyle.cpp:2467
2467        if (const QAbstractScrollArea *sa = qobject_cast<const QAbstractScrollArea *>(w->parentWidget())) {
(gdb) bt
 #0  containerWidget(QWidget const*) (w=w@entry=0x0) at /usr/src/debug/dev-qt/qtwidgets-5.15.7/qtbase-everywhere-src-5.15.7/src/widgets/styles/qstylesheetstyle.cpp:2467
 #1  0x00007ffff4aa0ad6 in QStyleSheetStyle::drawPrimitive(QStyle::PrimitiveElement, QStyleOption const*, QPainter*, QWidget const*) const (this=0x555559917900, pe=<optimized out>, opt=0x55555ea4b5c0, p=0x7fffffffcfd0, w=0x0) at /usr/src/debug/dev-qt/qtwidgets-5.15.7/qtbase-everywhere-src-5.15.7/src/widgets/styles/qstylesheetstyle.cpp:4452
 #2  0x00007fff61d4a86b in KQuickStyleItem::paint(QPainter*) (this=this@entry=0x55555ea4a1e0, painter=painter@entry=0x7fffffffcfd0) at /usr/src/debug/kde-frameworks/qqc2-desktop-style-5.101.0/qqc2-desktop-style-5.101.0/plugin/kquickstyleitem.cpp:1667
 #3  0x00007fff61d4b22a in KQuickStyleItem::updatePolish() (this=0x55555ea4a1e0) at /usr/src/debug/kde-frameworks/qqc2-desktop-style-5.101.0/qqc2-desktop-style-5.101.0/plugin/kquickstyleitem.cpp:1928
 #4  0x00007ffff57717c2 in QQuickWindowPrivate::polishItems() (this=0x55555ea2e760) at /usr/src/debug/dev-qt/qtdeclarative-5.15.7-r1/qtdeclarative-everywhere-src-5.15.7/src/quick/items/qquickwindow.cpp:393
 #5  0x00007ffff570f4ef in QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*, bool) (this=this@entry=0x5555598eb770, w=w@entry=0x7fffe000aef0, inExpose=inExpose@entry=true) at /usr/src/debug/dev-qt/qtdeclarative-5.15.7-r1/qtdeclarative-everywhere-src-5.15.7/src/quick/scenegraph/qsgthreadedrenderloop.cpp:1576
 #6  0x00007ffff5710a8e in QSGThreadedRenderLoop::handleExposure(QQuickWindow*) (this=0x5555598eb770, window=<optimized out>) at /usr/src/debug/dev-qt/qtdeclarative-5.15.7-r1/qtdeclarative-everywhere-src-5.15.7/src/quick/scenegraph/qsgthreadedrenderloop.cpp:1374
 #7  0x00007ffff43d2b45 in QWindow::event(QEvent*) (this=0x7fffe0006eb0, ev=<optimized out>) at /usr/src/debug/dev-qt/qtgui-5.15.7-r1/qtbase-everywhere-src-5.15.7/src/gui/kernel/qwindow.cpp:2450
 #8  0x00007ffff49ee481 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x7fffe0006eb0, e=0x7fffffffd460) at /usr/src/debug/dev-qt/qtwidgets-5.15.7/qtbase-everywhere-src-5.15.7/src/widgets/kernel/qapplication.cpp:3637
 #9  0x00007ffff3e2d618 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x7fffe0006eb0, event=0x7fffffffd460) at /usr/src/debug/dev-qt/qtcore-5.15.7/qtbase-everywhere-src-5.15.7/src/corelib/kernel/qcoreapplication.cpp:1064
 #10 0x00007ffff43c8368 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) (e=0x55555f648b30) at /usr/src/debug/dev-qt/qtgui-5.15.7-r1/qtbase-everywhere-src-5.15.7/src/gui/kernel/qguiapplication.cpp:3261
 #11 0x00007ffff43a55ab in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) (flags=flags@entry=...) at /usr/src/debug/dev-qt/qtgui-5.15.7-r1/qtbase-everywhere-src-5.15.7/src/gui/kernel/qwindowsysteminterface.cpp:1169
 #12 0x00007fffef102622 in xcbSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at /usr/src/debug/dev-qt/qtgui-5.15.7-r1/qtbase-everywhere-src-5.15.7/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:105
 #13 0x00007ffff386d030 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
 #14 0x00007ffff386d2d8 in  () at /usr/lib64/libglib-2.0.so.0
 #15 0x00007ffff386d36f in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
 #16 0x00007ffff3e80e55 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x5555596a4770, flags=...) at /usr/src/debug/dev-qt/qtcore-5.15.7/qtbase-everywhere-src-5.15.7/src/corelib/kernel/qeventdispatcher_glib.cpp:423
 #17 0x00007ffff3e2c00b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffffffd700, flags=..., flags@entry=...) at /usr/src/debug/dev-qt/qtcore-5.15.7/qtbase-everywhere-src-5.15.7/include/QtCore/../../src/corelib/global/qflags.h:69
 #18 0x00007ffff3e344ea in QCoreApplication::exec() () at /usr/src/debug/dev-qt/qtcore-5.15.7/qtbase-everywhere-src-5.15.7/include/QtCore/../../src/corelib/global/qflags.h:121
 #19 0x00005555594a5c43 in main(int, char**) (argc=2, argv=0x7fffffffdab8) at /home/nicolas/Dokumente/devel/open-source/nheko/src/main.cpp:401
(gdb) p w
$1 = (const QWidget *) 0x0

This reverts commit 0035c359.

*  (confetti) message support.  Thanks @LorenDB !