UM sheet improvement
- When a system in the UM sheet is tag with "leave for now" remove it from the bot display (!um) but not from the !hold. (top priority)
- If someone hold merits with the !hold cmd in a "leave for now" system, mention him telling that it's currently pointless to um this system.
- If a system come back from "leave for now" to regular priority, display it again in the !um cmd.
- Adding a !um "system" -p "priority" to change priority of a system without opening the sheet. (admin only)
- Um --list does a list of every systems and list every merits held. This need to change, if there is no held merits + the system is fully undermined, do not display anymore. If the systems has 0 cmdr holding and not completed, display it. If the systems is tagged "leave for now" do not display.
issue