修改标绘物UI点击时的操作： 改为中键点击时才会发生聚焦，避免左键拖拽时产生误操作

src/app/babylon/model/info/mark/model-info-mark.ts

@@ -145,9 +145,12 @@ export class ModelInfo_mark extends ModelInfo {
             this.uiFollowHead.thickness = 0;
             this.uiFollowHead.adaptWidthToChildren = true;
             this.uiFollowHead.linkWithMesh(this.headMesh);
-            this.uiFollowHead.onPointerClickObservable.add(() => {
+            this.uiFollowHead.onPointerClickObservable.add((info: Vector2WithInfo) => {
                 MarkWindow.instance.selectMarkDataFrom3d(instance, true);
-                instance.lookAt();
+                //中间点击时才发生聚焦
+                if (info.buttonIndex == 1) {
+                    instance.lookAt();
+                }
             });
 
             this.uiFollowHeadBg = new Rectangle('bg');