Fixed bug with Insight QApplication object being created too soon, which in turn caused issues with signal capturing.

Also ensured that we only initialise the Insight object when the user has enabled Insight in their config.

src/Insight/Insight.hpp

@@ -52,7 +52,22 @@ namespace Bloom
         void startup();
 
     public:
-        explicit Insight(EventManager& eventManager): eventManager(eventManager) {};
+        /**
+         * Insight constructor.
+         *
+         * Note: We use the comma operator in the application() initializer to set the Qt::AA_ShareOpenGLContexts
+         * attribute, as this is required by Qt before creating a QCoreApplication instance.
+         *
+         * @param eventManager
+         */
+        explicit Insight(EventManager& eventManager):
+        eventManager(eventManager),
+        application(
+            (
+                QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true),
+                QApplication(this->qtApplicationArgc, this->qtApplicationArgv.data())
+            )
+        ) {};
 
         void setApplicationConfig(const ApplicationConfig& applicationConfig) {
             this->applicationConfig = applicationConfig;