thread pool update + refactor

src/files/WorldConverter.cpp

@@ -92,6 +92,12 @@ void WorldConverter::write() {
     wfile->write(nullptr, content);
 }
 
+void WorldConverter::waitForEnd() {
+    while (isActive()) {
+        update();
+    }
+}
+
 uint WorldConverter::getWorkRemaining() const {
     return tasks.size();
 }

src/files/WorldConverter.h

@@ -58,6 +58,11 @@ public:
         tasks = {};
     }
 
+    bool isActive() const override {
+        return !tasks.empty();
+    }
+
+    void waitForEnd() override;
     void write();
 
     uint getWorkRemaining() const override;