Fix tooltip & popup positioning (#4740)

* Fix tooltip & popup positioning

This tries to ensure the tooltip & popups are created on the correct
monitor

* Add changelog entry

* Clean up debug output

* Use the full frame geometry to figure out screen bound movements

* Remove the now-unused `setStayInScreenRect` function

* Change the UserInfoPopup offset to be based on its width & height
instead

* Remove more debug output

src/widgets/dialogs/switcher/QuickSwitcherPopup.cpp

@@ -46,7 +46,6 @@ QuickSwitcherPopup::QuickSwitcherPopup(QWidget *parent)
 
     this->initWidgets();
 
-    this->setStayInScreenRect(true);
     const QRect geom = parent->geometry();
     // This places the popup in the middle of the parent widget
     this->setGeometry(QStyle::alignedRect(Qt::LeftToRight, Qt::AlignCenter,