main: Globally disable the "?" button on dialogs (#6263)

Sets the AA_DisableWindowContextHelpButton attribute to disable this useless button globally. This is disabled by default on Qt6.

src/citra_qt/debugger/profiler.cpp

@@ -50,9 +50,8 @@ MicroProfileDialog::MicroProfileDialog(QWidget* parent) : QWidget(parent, Qt::Di
     setObjectName(QStringLiteral("MicroProfile"));
     setWindowTitle(tr("MicroProfile"));
     resize(1000, 600);
-    // Remove the "?" button from the titlebar and enable the maximize button
-    setWindowFlags((windowFlags() & ~Qt::WindowContextHelpButtonHint) |
-                   Qt::WindowMaximizeButtonHint);
+    // Enable the maximize button
+    setWindowFlags(windowFlags() | Qt::WindowMaximizeButtonHint);
 
 #if MICROPROFILE_ENABLED