Collection of a number of changes (#2286)

* Cleanup Property code
* Remove NOLINT statements
* Return Property class types as string_view
* Remove getStringValue function
* Simplify string value retrieval
* Ensure that image paths in the ImageSequenceTileProvider are sorted (closes #2205)
* Some cleanup of OpenSpaceEngine
* Cleanup documentation
* Some more cleanup of engine classes
* Some more cleanup
* Update SGCT repository
* Use new Jenkins node identifiers as the old method broke with update

include/openspace/engine/openspaceengine.h

@@ -104,7 +104,7 @@ public:
     void touchDetectionCallback(TouchInput input);
     void touchUpdateCallback(TouchInput input);
     void touchExitCallback(TouchInput input);
-    void handleDragDrop(const std::string& file);
+    void handleDragDrop(std::filesystem::path file);
     std::vector<std::byte> encode();
     void decode(std::vector<std::byte> data);
 
@@ -126,8 +126,7 @@ public:
     AssetManager& assetManager();
     LoadingScreen* loadingScreen();
 
-    void writeSceneDocumentation();
-    void writeStaticDocumentation();
+    void writeDocumentation();
     void createUserDirectoriesIfNecessary();
 
     /**
@@ -141,7 +140,6 @@ private:
     void loadFonts();
 
     void runGlobalCustomizationScripts();
-    std::string generateFilePath(std::string openspaceRelativePath);
     void resetPropertyChangeFlagsOfSubowners(openspace::properties::PropertyOwner* po);
 
     properties::BoolProperty _printEvents;
@@ -156,9 +154,6 @@ private:
 
     glm::vec2 _mousePosition = glm::vec2(0.f);
 
-    //grabs json from each module to pass to the documentation engine.
-    std::string _documentationJson;
-
     std::future<void> _writeDocumentationTask;
 
     ShutdownInformation _shutdown;