fix: 优化保存后关闭提示

[pengfeixx]

优化保存后关闭提示

Bug: https://pms.uniontech.com/bug-view-269141.html
Log: 优化保存后关闭提示

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在save函数中，_dirty被设置为0两次，应该检查是否有必要。
• page()->borad()可能是一个拼写错误，应该是page()->board()。
• fileHander()可能是一个拼写错误，应该是fileHandler()。

是否建议立即修改:

• 是

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: pengfeixx, rb-union

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• debian/deepin/OWNERS

Approvers can indicate their approval by writing /approve in a comment
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[jeffshuai]

[是否满足兼容性要求] Y
[是否满足commit提交规范] Y
[是否满足编码规范] Y
[Review结论] Pass
[Fail原因] N/A