修正无法选择靠左靠右的问题

src/Add-on/DrawBoard/DrawBoardTool.ts

@@ -60,7 +60,7 @@ export abstract class DrawBoardTool implements Command
             let ptRes = await app.m_Editor.GetPoint({
                 Msg: "点选画板区域",
                 AllowNone: true,
-                KeyWordList: [{ msg: "框选", key: "S" }, { msg: "全选", key: "A" }, { msg: "放弃", key: "U" }]
+                KeyWordList: [{ msg: "框选", key: "S" }, { msg: "放弃", key: "U" }]
             });
 
             if (ptRes.Status === PromptStatus.OK)

src/Geometry/SpaceParse/GeneralSpaceParse.ts

@@ -24,6 +24,10 @@ export class GeneralSpaceParse extends SpaceParse
     async SpaceParse()
     {
         await super.SpaceParse();
+
+        if (this.boardMap.size === 0)
+            return;
+
         let unionBoxCol: Box3Ext[] = [];
         let spliteBoxs = new Map<SplitType, Box3Ext>();
         for (let [boardType, boards] of this.boardMap)