fix: After selecting "Cancel" when revoking, attempting to do so again will skip the previous operation's revocation

[liyigang1]

The stack order of the save file operation is incorrect

Log: After selecting "Cancel" when revoking, attempting to do so again will skip the previous operation's revocation
Bug: https://pms.uniontech.com/bug-view-257853.html

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在FileOperationsEventReceiver::handleOperationUndoDeletes函数中，对op变量的引用可能不正确，因为op在循环中被修改，但在循环外部仍然保持不变。
• FullTextSearcherPrivate::createIndex函数中，status.storeRelease(AbstractSearcher::kCompleted);这行代码被移除，可能会影响程序的逻辑。如果移除这行代码是有意为之，应该确保这一改动不会对程序的其他部分产生负面影响。
• OperationsStackManagerDbus::SaveOperations和OperationsStackManagerDbus::SaveRedoOperations函数中的代码被简化，移除了对back变量的处理，这可能会改变操作的顺序。需要确认这是否是预期的行为。

是否建议立即修改:

• 是，需要确认这些更改是否符合预期的逻辑，并确保程序的其他部分能够正确处理这些更改。如果这些更改是无意的，应该立即修复。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: liyigang1, max-lvs

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[liyigang1]

/merge