Find and replace replace all & undo

[kbinieda]

Currently, find-and-replace replace all feature does not work well with undo feature, that is a single undo step rollbacks only one change instead of all changes.

That makes scenarios with lots of changes hard to rollback, ex. 1k changes with single replace all click will need 1k undo clicks to rollback to previous state.

Steps to reproduce:

1. Use find-and-replace replace all command on any manual test with a keyword that returns multiple results.
2. Try to rollback the changes using undo button.

[mlewand]

Fixing it should be as simple as wrapping _replace() call in replace all command with a model.change() call that will batch it into one transaction.

[Ruman-Al]

I don't know how to use replace all.because as I am implemented it didn't do anything.can you show me the implementation.