Pull request #3502: 无JIRA fix: button_group选中问题

Merge in VISUAL/fineui from ~DAILER/fineui:es6 to es6

* commit '791b2858c0236fcaa868dbeeecaa42dc83400062':
  update
  无JIRA fix: button_group选中问题

.gitignore

@@ -3,3 +3,4 @@ packages/demo/dist
 packages/fineui/dist/*
 !packages/fineui/dist/font
 !packages/fineui/dist/images
+.idea/

packages/fineui/src/base/combination/group.button.js

@@ -86,8 +86,8 @@ export class ButtonGroup extends Widget {
                 this.setValue(newValue);
             })
             : value;
-        if (isKey(value) || isNotEmptyArray(value)) {
+        if (isKey(this.options.value) || isNotEmptyArray(this.options.value)) {
-            this.setValue(value);
+            this.setValue(this.options.value);
         }
     }