Description of problem:
Zanata is not able to handle project-wide search and replace when the search results are a large number.
Version-Release number of selected component (if applicable): 3.4
How reproducible: 100%
Steps to Reproduce:
1. Login to translate.zanata.org
2. Select a project and version.
3. Open Project-wide search and replace page and search target text which has a large number of results.
4. Try replace them all
It returns an error, and operation fails.
It can be only done in small batches, which takes a long time.
It should be able to handle a large number.