Tasks filtering

By now, tasks can be filtered by worker, type, state, received and started datetime. Also, filtering by args/kwargs/result/state value available.

Flower uses github-style syntax for args/kwargs/result filtering.

• foo find all tasks containing foo in args, kwargs or result
• args:foo find all tasks containing foo in arguments
• kwargs:foo=bar find all tasks containing foo=bar keyword
• result:foo find all tasks containing foo in result
• state:FAILURE find all failed tasks

If the search term contains spaces it should be enclosed in ” (e.g. args:”hello world”).

For examples, see tests/utils/test_search.py.