update osx project

src/node_stroke_preview.cpp

@@ -508,13 +508,7 @@ void NodeStrokePreview::draw_stroke()
         s_running = true;
         s_renderer = std::thread([] {
             BT_SetTerminate();
-            #if __OSX__
-            // There's some weird multithread bug at startup
-            // This random wait is a temp fix
-            // Today is 25/05/2019
-            // Good luck, future Omar
-            std::this_thread::sleep_for(std::chrono::seconds(1));
-            #endif
+
             m_sampler_linear.create();
             m_sampler_linear_repeat.create(GL_LINEAR, GL_REPEAT);
             m_sampler_mipmap.create();
@@ -553,6 +547,8 @@ void NodeStrokePreview::draw_stroke()
 
                         gl.restore();
                     });
+                    
+                    node->app_redraw();
 
                     //std::this_thread::sleep_for(std::chrono::milliseconds(30));
                     std::this_thread::yield();