WIP: Build fixes und EXTERNAL_DEPENDENCIES.md

qt6-after/qt6-migrated-legatus/Lts/Common/LtsVirtualKeyboard/LtsVirtualKeyboard.cpp

@@ -5,7 +5,6 @@
 #include <LtsAppManager/lts_app_manager.h>
 #include <QApplication>
 #include <QClipboard>
-#include <QDesktopWidget>
 #include <QDoubleSpinBox>
 #include <QHBoxLayout>
 #include <QKeyEvent>
@@ -540,13 +539,9 @@ QWidget* LtsVirtualKeyboard::setDefaultTextStyle(QWidget* control)
 
 QSize LtsVirtualKeyboard::availableDesktopSize() const
 {
-#if QT_VERSION < QT_VERSION_CHECK(5, 12, 0)
-    return QApplication::desktop()->availableGeometry().size();
-#else
     const QWindow* win = window()->windowHandle();
     const QScreen* scr = (win && win->screen()) ? win->screen() : QGuiApplication::primaryScreen();
     return scr ? scr->availableSize() : QSize(1280, 1024);
-#endif
 }
 
 void LtsVirtualKeyboard::init_keyboard(QWidget* focusThisControl)