CMakeLists: Migrate Qt checking over to using components

Qt has since made their library usable with the components system within
CMake, so we can just use that to simplify the library finding and linking.

CMakeLists.txt

@@ -123,7 +123,7 @@ if(TARGET boo AND NOT WINDOWS_STORE AND NOT NX)
   endif()
 
   # Editor
-  find_package(Qt5Widgets)
+  find_package(Qt5 COMPONENTS Widgets)
   if (Qt5Widgets_FOUND)
     message(STATUS "Qt5 found, amuse-gui will be built")
     add_subdirectory(Editor)

Editor/CMakeLists.txt

@@ -2,12 +2,7 @@ cmake_minimum_required(VERSION 3.10)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-find_package(Qt5Widgets REQUIRED)
+find_package(Qt5 COMPONENTS LinguistTools Network Qml Svg Widgets Xml REQUIRED)
-find_package(Qt5Network REQUIRED)
-find_package(Qt5Xml REQUIRED)
-find_package(Qt5Svg REQUIRED)
-find_package(Qt5Qml REQUIRED)
-find_package(Qt5LinguistTools REQUIRED)
 
 if(WIN32)
   list(APPEND PLAT_SRCS platforms/win/amuse-gui.rc platforms/win/amuse-gui.manifest)
@@ -76,12 +71,24 @@ if(COMMAND add_sanitizers)
 endif()
 
 set_target_properties(amuse-gui PROPERTIES
-        MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/platforms/mac/Info.plist")
+  MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/platforms/mac/Info.plist"
+)
 
-target_link_libraries(amuse-gui ${PLAT_LIBS}
+target_link_libraries(amuse-gui
-        ${Qt5Widgets_LIBRARIES}
+  ${PLAT_LIBS}
-        ${Qt5Network_LIBRARIES}
+
-        ${Qt5Xml_LIBRARIES}
+  Qt5::Network
-        ${Qt5Svg_LIBRARIES}
+  Qt5::Qml
-        ${Qt5Qml_LIBRARIES}
+  Qt5::Svg
-        amuse boo ${BOO_SYS_LIBS} logvisor athena-core xxhash ${ZLIB_LIBRARIES} lzokay)
+  Qt5::Widgets
+  Qt5::Xml
+
+  amuse
+  athena-core
+  boo
+  ${BOO_SYS_LIBS}
+  logvisor
+  lzokay
+  xxhash
+  ${ZLIB_LIBRARIES}
+)