Merge feature/lift-lts-viewer-module-upto-qt6 into feature/regression-arcgis300-symbology-migration

- Integrated LTS viewer module with Qt6 migration
- Resolved all merge conflicts by keeping current branch versions
- Preserved existing Qt6 migration fixes

qt6-after/qt6-migrated-legatus/Lts/Tools/LogViewer/sortfiltermodel.cpp

@@ -17,8 +17,7 @@ void SortFilterModel::setStartDateFilter(const QDateTime &start)
   if (m_start == start)
     return;
   m_start = start;
-  beginFilterChange();
-    endFilterChange();
+  invalidateFilter();
 }
 
 
@@ -27,8 +26,7 @@ void SortFilterModel::setEndDateFilter(const QDateTime &end)
   if (m_end == end)
     return;
   m_end = end;
-  beginFilterChange();
-    endFilterChange();
+  invalidateFilter();
 }
 
 void SortFilterModel::figureFilterOut()
@@ -43,8 +41,7 @@ void SortFilterModel::resetAllFilter()
   m_start = QDateTime();
   m_end = QDateTime();
   figureFilterOut();
-  beginFilterChange();
-    endFilterChange();
+  invalidateFilter();
 }