Revert "Use SplashScreen flag for all aqt tooltips (#3194)"

This reverts commit e50a768e44.

This appears to have caused a regression with keyboard shortcuts

https://forums.ankiweb.net/t/anki-24-06-release-candidate/44926/14

CONTRIBUTORS

@@ -173,7 +173,6 @@ jthulhu <https://github.com/jthulhu>
 Escape0707 <tothesong@gmail.com>
 Loudwig <https://github.com/Loudwig>
 Wu Yi-Wei <https://github.com/Ianwu0812>
-Voczi <dev@voczi.com>
 
 ********************
 

qt/aqt/utils.py

@@ -976,7 +976,7 @@ def tooltip(
     )
     lab.setFrameStyle(QFrame.Shape.Panel)
     lab.setLineWidth(2)
-    lab.setWindowFlags(Qt.WindowType.SplashScreen)
+    lab.setWindowFlags(Qt.WindowType.ToolTip)
     if not theme_manager.night_mode:
         p = QPalette()
         p.setColor(QPalette.ColorRole.Window, QColor("#feffc4"))