When creating or deleting a saved search, all tasks' modification date fields get modified

[nekohayo]

With the "screenshots" dataset,

1. cp gtg_data.xml gtg_data_beforesearch_1.xml
2. ./launch.sh
3. Save a new search for @errands !or @money
4. Close the app
5. meld gtg_data_beforesearch_1.xml gtg_data.xml

Result: you see that the <modified> field for all tasks has been modified.

Then...

6. cp gtg_data.xml gtg_data_beforesearch_2.xml
7. ./launch.sh
8. Delete the previously created saved search
9. Close the app
10. meld gtg_data_beforesearch_2.xml gtg_data.xml

...and I think it will have changed all the modification dates again.