Please check if the feature has not already been requested.
If not, please describe it

Maximize and minimize categories
Hi,It'd be great to be able to minimize and maximize categories when creating a ticket. In the case, we use a lot of categories and we don't want to expand all by default.

Have same alignement in headers and columns
text in column is left aligned and text is centered in column header, this is sometimes a bit confusing.
Is think header should have same aligment than its column
http://forum.glpi-project.org/viewtopic.php?pid=330393#p330393

Rocket.Chat's hubot for GLPI integration
Add an adapter for RocketChat (https://rocket.chat/).
The adapter can perform the following :
- get info from a specific ticket
- get all the open tickets
- get all tickets from an operator
- get all tickets from an user
- ...
Thanks

Action button dissappeared - over 1k consumables
We have over 1000 usb mouses in our consumables, since reaching that 1k mark the action button disappeared because of "too large selection" even when you have for example 50 position display setting. I think this bug is connectet to the paging feature implemented not so long time ago.

Add projects to global search
It would be great to be able to search for projects and project tasks in the global search.

Add VLAN search field when associate a VLAN to network port.
When the list of VLANs is large scroll it manually is uncomfortable.

Slack Integration
Dear GLPI Staff. Best Regards. Is it possible to integrate Slack natively into the GLPI?
Possible Uses:
- The number of Channels would be made at the Reason of the Categories or Entities
Being
able to make use of the Bots so that they search in each channel would
look for objects related to this such as computers, incidents, devices
people etc.
Be able to use bots that can read the knowledge database and suggest things to us within the channel or recursively
Be able to use BOTS to suggest information such as possible tasks to create, documents and other objects
Be able to use BOTs that support projects, suppliers, contracts and SLAs.
That is to say Enable reading the different options, API and interaction with SLACK as best as possible.

mailgate : rule for assign requester entity
when creating ticket by web interface, ticket is created in the requester entity( it makes sense if only one entity)
there is no rule to assign entity for mailgate : ie :
criteria : collector is my collector
action : assign requester default entity ( or assign requester 'first' entity)

Add notification filters
Hello,
The idea is to be able to add filters on notifications.
Example: to send notifications for ticket update only when priority is greater than 'high'.
Thank you
Regards,
Tomolimo

[Cartridges] Cartridge order by user
Add a form to manage cartridges applications for end user:
- Consumables Application Validation System,
- Associated Notifications,
- Wizard user based on the available stock.
(like the "consumables" plugin)
Customer support service by UserEcho