Add an option to allow changing of the default "Display" settings from the System Console. (E.g set Theme & Teammate Name default "Display" settings globally).

The Android app requires the Google Play Services because it uses GCM for push notifications. This library is not open-source so it prevents Mattermost from being included in FOSS repositories like F-Droid.
It would be nice to have an option that builds the app without GCM.

It would be great to make admins life easier to develop an auto admin function to Mattermost that on click downloads, installs and updates the given installation, so the admin doesn't need terminal or root access anymore. Especially renewing the config (put the existing entries in the new/extended config) would be helpful.

Right now the scope of the search feature is limited to the current team. It would be great to have option allowing to specify the scope: channel, team, global (for example)

When there are multiple threads going on in the same channel, all lines are prefixed by a grey vertical bar. The only way to separate the threads is to read the reference message. If the vertical bars had different colors (randomly selected), it would be easy to at a glance see which messages belongs to which threads.

I think it would be a great idea to add spoiler tags like message or message but for spoilers (i.e ^This is a spoil^)

There are several ways to implement this:

-By having an expand/close button for showing/hiding the message
-By having to select the text to see it
-By having to hover on the text with the cursor to see it (might be problematic for touch-based devices)

I suggest discussing on what is the best for mattermost.

Add to jira plugin features to notify about new comments, description changes, attachments changes in a ticket.

Nobody likes it.
Tested on 4 people, everybody wanted to turn it off ASAP.

To preserve or moderate a given thread , theme or channel, tagging them makes the search much easier afterwards. But to make sure, that the given hashtags will be the same (tag cloud?), by typing # a dropdown should show up with already used tags. Behavior could be the same lile with @ or :(for smileys!).

Matrix.org is an open standard for decentralised communication, providing simple HTTP APIs for text chat and VoIP calling and conferencing. It would be great to be able to talk Mattermost <-> Matrix!

Currently it is not possible to have notifications triggered based on keywords, for example if there are any emergency keywords, a certain ringtone or vibration (or both) will be triggered.

This would be important in the event of any emergency that requires immediate action.

It was nice in Slack to say for the batch of invitees that have been recently invited that they be thrown into channels x, y, z instead of having to manually Add Member to varying channels or ask them to seek out channels and add themselves.

We need a MSI file for automated (silent) installation. That way you can deploy the application with the group policy of windows.

I would really like to have a task management feature or app integration.

As I'm using Glip for some projects (as guest, not for my company, to avoid the Data trap you know very well from Slack :-), the best way is to see how it works here:
https://glip.zendesk.com/hc/en-us/articles/202321814-Tasks-App

Just to expand on the original idea located here:

https://mattermost.uservoice.com/forums/306457-general/suggestions/17128663-configurable-away-time

Auto-away should at least be configurable in terms of minutes, or an option should exist to disable it completely. These settings should exist per user, but I'm not sure how much value it would add if the administrator determines the configuration for the team.

I´m just stealing the idea from slack ;)

I would like to see a simple bot that I can configure much like the "Slack Bot" (https://get.slack.help/hc/en-us/articles/202026038-Slackbot-your-assistant-notepad-programmable-bot)

This is a great and simple way to get started with bots!

Across Go and React code, town-square channel is hardcoded. Maybe we can make it configuration-based so teams can easily change it and the platform can redirect correctly to /channel/<new name>.

However doing this, we also have to change the mobile app code e.g. https://github.com/mattermost/android/blob/master/app/src/main/java/com/mattermost/mattermost/MainActivity.java#L137 code.