Using an emoji map was completely unnecessary in
the first place, because the reaction list from
the API response includes URLs for every custom
emoji anyway. The reaction list now also contains
a boolean field indicating whether it is an
external custom emoji, which is required because
people should only be able to react with Unicode
emojis and local custom ones, not with custom
emojis from other servers.
This adds an extra item to the local settings for
specifying the number of reactions shown in toots.
The detailed status view always shows all
reactions.
Too many reactions on a single post quickly get
spammy, so they are now sorted by count and only
the first MAX_REACTIONS number of different
emojis are actually displayed.
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