SIGNAL/SLOT migration: lts_app_descriptor_editor.cpp and qsql_informix.cpp

- Migrated 12 SIGNAL/SLOT connections in lts_app_descriptor_editor.cpp to function-pointer syntax
  - clicked, editingFinished, pressed, textChanged signals
  - Added required includes: QListView, QLineEdit, QPushButton
- Migrated 2 SIGNAL/SLOT connections in qsql_informix.cpp to function-pointer syntax
  - timeout signal connections
- Added Qt5::Core5Compat dependency for QTextCodec support in Qt6
  - Updated CMakeLists.txt to link Qt6::Core5Compat

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

build-rti-off/Lts/Services/CTestTestfile.cmake

@@ -0,0 +1,39 @@
+# CMake generated Testfile for 
+# Source directory: /repo/qt6-after/qt6-migrated-legatus/Lts/Services
+# Build directory: /repo/build-rti-off/Lts/Services
+# 
+# This file includes the relevant testing commands required for 
+# testing this directory and lists subdirectories to be tested as well.
+subdirs("AlarmManagement")
+subdirs("AreaEffectSimulation")
+subdirs("AssetManagement")
+subdirs("CentralEffectSimulation")
+subdirs("CodificationManagement")
+subdirs("EffectShowManagement")
+subdirs("EffectShowClient")
+subdirs("Evaluations")
+subdirs("ExerciseManagement")
+subdirs("ExerciseEventManagement")
+subdirs("FileManagement")
+subdirs("GuezIedManagement")
+subdirs("GuezMinelayerProcessing")
+subdirs("MarkerManagement")
+subdirs("Messaging")
+subdirs("MeteoDataManagement")
+subdirs("NotificationManagement")
+subdirs("OcSituationClient")
+subdirs("OcSituationServer")
+subdirs("OnlineReports")
+subdirs("ParticipantManagement")
+subdirs("PlanEditor")
+subdirs("ProjectDataManagement")
+subdirs("ProjectionWorkstation")
+subdirs("RecordingManagement")
+subdirs("ReportManagement")
+subdirs("RoutingServiceNG")
+subdirs("ServiceManagement")
+subdirs("ScreenRecording")
+subdirs("ServiceMonitor")
+subdirs("SituationMap")
+subdirs("SituationReplay")
+subdirs("VideoOverlayManagement")