Qt6 support (#1363)

* Initial Qt6 config

* Change Package order to reingfence missing packages

* Update to QT 6.2.0

* Qt 6.2.0 updates

* macOS fix

* Simplify handling QT5 & Qt6 in parallel

* Updates for Windows

* Fix macos build

* macOS linker fix

* General support of QTDIR, update docu

* MaxOS add default qt directories

* Fix merge typo

* Update default CMakeSettings.json with installation path options

* Add additional libs required by Qt6 to CompileHowTo

* Fix Qt5 items

Co-authored-by: Paulchen-Panther <16664240+Paulchen-Panther@users.noreply.github.com>

libsrc/grabber/qt/CMakeLists.txt

@@ -2,9 +2,6 @@
 SET(CURRENT_HEADER_DIR ${CMAKE_SOURCE_DIR}/include/grabber)
 SET(CURRENT_SOURCE_DIR ${CMAKE_SOURCE_DIR}/libsrc/grabber/qt)
 
-find_package(Qt5Widgets REQUIRED)
-
-include_directories( ${X11_INCLUDES} )
 
 FILE ( GLOB QT_GRAB_SOURCES "${CURRENT_HEADER_DIR}/Qt*.h"  "${CURRENT_SOURCE_DIR}/*.h"  "${CURRENT_SOURCE_DIR}/*.cpp" )
 
@@ -12,5 +9,5 @@ add_library(qt-grabber ${QT_GRAB_SOURCES} )
 
 target_link_libraries(qt-grabber
 	hyperion
-	Qt5::Widgets
+	${QT_LIBRARIES}
 )

libsrc/grabber/qt/QtGrabber.cpp

@@ -5,7 +5,6 @@
 #include <QPixmap>
 #include <QWindow>
 #include <QGuiApplication>
-#include <QWidget>
 #include <QScreen>
 #include <QJsonObject>
 #include <QJsonArray>