Notify Modified Messages And Added Reactions
There should be an option to allow MM to send notifications wheneven user modifies a message or maybe even when a message is deleted.
Also you be great to have anotification wheneven someone adds a reaction to your message.
I support the orignal poster's idea. I personally, as my highest priority, am interested in notifications for reactions to one's messages.
It'd be useful to have some sort of way to know about the emoji-reactions people have issued to posts of mine. One way is just the option to enable another notification that's in the same style as for messages.
Another way to do it is have something on the sidebar that's like the "Threads" item in Slack (I'm assuming you have this too -- I'm just new to Mattermost so I don't know yet). Except it's called Reactions instead of Threads, and when you click on it, it shows you (just like Threads does) all of messages that have had reactions, in chronological order of most recent reaction. And maybe it lists the names of folks explicitly next to each reaction type, so you don't have to hover over each emoji to see who did it. And the list of names also is in some kind of chronological order.