Move TitleSequenceManager::Scan into preloader as well

Add strings for checking and loading title sequence

data/language/en-GB.txt

@@ -3707,6 +3707,8 @@ STR_6632    :Checking object files...
 STR_6633    :Checking scenario files...
 STR_6634    :Checking track design files...
 STR_6635    :Checking asset packs...
+STR_6636    :Checking title sequences...
+STR_6637    :Loading title sequence...
 
 #############
 # Scenarios #

src/openrct2/Context.cpp

@@ -518,8 +518,6 @@ namespace OpenRCT2
 
             ContextInit();
 
-            TitleSequenceManager::Scan();
-
             if (!gOpenRCT2Headless)
             {
                 auto* preloaderScene = GetPreloaderScene();
@@ -570,7 +568,13 @@ namespace OpenRCT2
             preloaderScene->UpdateCaption(STR_CHECKING_SCENARIO_FILES);
             _scenarioRepository->Scan(currentLanguage);
 
-            preloaderScene->UpdateCaption(STR_LOADING_GENERIC);
+            preloaderScene->UpdateCaption(STR_CHECKING_TITLE_SEQUENCES);
+            TitleSequenceManager::Scan();
+
+            if (preloaderScene->GetCompletionScene() == GetTitleScene())
+                preloaderScene->UpdateCaption(STR_LOADING_TITLE_SEQUENCE);
+            else
+                preloaderScene->UpdateCaption(STR_LOADING_GENERIC);
         }
 
     public:

src/openrct2/localisation/StringIds.h

@@ -3860,6 +3860,8 @@ enum : uint16_t
     STR_CHECKING_SCENARIO_FILES = 6633,
     STR_CHECKING_TRACK_DESIGN_FILES = 6634,
     STR_CHECKING_ASSET_PACKS = 6635,
+    STR_CHECKING_TITLE_SEQUENCES = 6636,
+    STR_LOADING_TITLE_SEQUENCE = 6637,
 
     // Have to include resource strings (from scenarios and objects) for the time being now that language is partially working
     /* MAX_STR_COUNT = 32768 */ // MAX_STR_COUNT - upper limit for number of strings, not the current count strings

src/openrct2/scenes/Scene.cpp

@@ -38,6 +38,11 @@ void Scene::FinishScene()
     }
 }
 
+IScene* Scene::GetCompletionScene()
+{
+    return _nextScene;
+}
+
 void Scene::SetCompletionScene(IScene* scene)
 {
     _nextScene = scene;

src/openrct2/scenes/Scene.h

@@ -27,6 +27,8 @@ namespace OpenRCT2
         virtual void Load() = 0;
         virtual void Tick() = 0;
         virtual void Stop() = 0;
+
+        virtual IScene* GetCompletionScene() = 0;
         virtual void SetCompletionScene(IScene* scene) = 0;
     };
 
@@ -38,6 +40,7 @@ namespace OpenRCT2
         GameState_t& GetGameState() override;
         IContext& GetContext() override;
 
+        IScene* GetCompletionScene() override;
         void SetCompletionScene(IScene* scene) override;
 
     protected: