Reaction summary view and sorting reactions by count and then timestamp (#942)
* Sort reactions by count and then timestamp
- Sort reactions within an aggregation by timestamp descending. This puts the most recent at the top, useful in cases like the reaction summary view or getting the most recent reaction.
- Sort aggregated reactions by count and then timestamp ascending, using the most recent reaction in the aggregation. This appends new aggregations on the end of the reaction layout.
* Add reaction summary view
* fix warnings
* Fix test unit tests and add sorting tests
- Fix broken build in test code
- Add a test for reaction sorting
* Remove default closure, move logic to presenter and add tests
* Update screenshots
* Fix imports
* Revert Screenshots I didn't update
* Fix imports remove screetshots
* Update screenshots
* Update screenshots
* Address comments.
* Update screenshots
* Remove unnecessary snapshotFlow
* Fix code quality checks
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Co-authored-by: ElementBot <benoitm+elementbot@element.io>