[FIX] conditional format: huge revisions on copy/paste cf #5059
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When copy/pasting a conditional format, the revision had one ADD_CONDITIONAL_FORMAT command per copied cell. That lead to huge revisions if, for example, a whole column with a CF was copied.
Now the revision only has a single ADD_CONDITIONAL_FORMAT command per modified CF.
The exact same work was done for data validation rules.
Benchmark:
Copy/paste a column of 100 cells with a CF:
Before: 46.6KB revision
After: 526B revision (divided by 88!)
Task: 4240668
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