Fix FileManagement Build-Fehler (BUILD_RTI=OFF)

- flm_db.h: Stub-Header mit Folder/FileContent Klassen erstellt
- flm_enums.hpp: MainFolder Enum hinzugefügt (None=0)
- flm_translation.h: toInt() entfernt, trFolderName() angepasst
- Plugin-Interfaces erstellt (flm, opm, exm)
- Viewer-Dialogs: QString-Konvertierungen behoben
- AdvancedSymbology CMakeLists.txt: Ungültige Pfade entfernt
- ism_mounting_point.cpp: Redundante Definitionen entfernt

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

qt6-after/qt6-migrated-legatus/Lts/Viewer/LtsFileDialog/lts_dialog_model_folder.cpp

@@ -152,7 +152,7 @@ bool DialogModelFolder::initModel(int exerciseId, const QVector<FileManagement::
         }
       }
       FileManagement::MainFolder mainFolder = static_cast<FileManagement::MainFolder>(data.path()[0]);
-    //qCritical() << "Folder = " << QString::fromStdString(data.name()) << ", mainFolder = " << mainFolder.underlying();
+    //qCritical() << "Folder = " << data.name() << ", mainFolder = " << mainFolder.underlying();
     if (!mainFolders.contains(mainFolder))
     {
      // qCritical() << "Excluded id = " << data.id();
@@ -243,7 +243,7 @@ bool DialogModelFolder::onDeleteRow(const QModelIndex &idx, bool isFirstItem)
   {
     NGLTreeItem *item = privateData(idx);
     FileManagement::Folder data = item->data().value<FileManagement::Folder>();
-    data.isDeleted(true);
+    data.setDeleted(true);
   }
   removeRow(idx.row(), idx.parent());
 
@@ -289,9 +289,9 @@ bool DialogModelProxyFolder::lessThan(const QModelIndex &source_left, const QMod
     return FileManagement::toInt(folderLeft.mainFolder()) < FileManagement::toInt(folderRight.mainFolder());
   }
 
-  if (QString::fromStdString(folderLeft.name()) != QString::fromStdString(folderRight.name()))
+  if (folderLeft.name() != folderRight.name())
   {
-    return (QString::fromStdString(folderLeft.name()) < QString::fromStdString(folderRight.name()));
+    return (folderLeft.name() < folderRight.name());
   }
 
   return folderLeft.id() < folderRight.id();