distance to closest node displayed, timing problems with midi notes being sent 1 to 3ms too early, or too late

src/state-manager.h

@@ -53,7 +53,9 @@ class AppState{
 			for(auto &n : copy_nodes_ids){
 				int old_id = n;
 				int new_id = nm.copyNode(n, position + nm.nodes[n].drag_offset);
-				
+				nm.nodes[new_id].copied = false;
+				nm.nodes[new_id].selected = true;
+
 				for(auto &c : copy_connections){
 					if(c.v1 == old_id) c.v1 = new_id;
 					if(c.v2 == old_id) c.v2 = new_id;
@@ -121,10 +123,10 @@ class AppState{
 		void draw(Vec2D<float> *mouse_pos, Camera2D *camera){
 			mutex.lock();
 			updateMidiPorts();
+			mutex.unlock();
 			nm.drawNodes(mouse_pos, camera);
 			cm.drawConnections(mouse_pos, camera);
 			sm.drawSignals(mouse_pos, camera);
-			mutex.unlock();
 		}
 
 		void drawUI(Vec2D<float> *mouse_pos, Camera2D *camera){