* ios: block members (WIP)
* CIBlocked, blocking api
* show item as blocked
* show blocked and merge multiple deleted items
* update block icons
* split sent and received deleted to two categories
* merge chat feature items, refactor CIMergedRange
* merge feature items, two profile images and names on merged items
* ensure range is withing chat items range
* merge group events
* fix/refactor
* make group member changes observable
* exclude some group events from merging
* fix states not updating and other fixes
* load list of members when tapping profile
* refactor
* fix incorrect merging of sent/received marked deleted
* fix incorrect expand/hide on single moderated items without content
* load members list when opening member via item
* comments
* fix member counting in case of name collision
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