Missing simulation command hotkeys

[elexis]

For most simulation commands (Commands.js), hotkeys exist. UnitAI actions available from the selection panel were added in #4008.

Should be added:

• townbell: increase-alert-level, alert-end
• diplomacy, attack-request, tribute: a hotkey to open the diplomacy dialog
• barter+trade: a hotkey to open the trade+barter dialog, hotkey already added by ​D88
• Stance (violent, aggressive, defensive, standground, passive, ...)
• Lock / Unlock gates
• Pack / Unpack siege engines
• set-dropsite-sharing could be added while at it

Not going to be implemented (here):

• Developer cheats: control-all, promote, reveal-map, debug-print, set-shading-color
• Training, Upgrade - partially exists, but would be more comfortable to assign hotkeys to generic buildings/unit names like "Barracks", rather than assigning it to the N'th building. I recall some related trac tickets with broken outdated patches. So doesn't need to be done in this ticket.

Everything else is already implemented.

Thanks fpre for noticing the absent townbell hotkey.

[Imarok]

Move tickets to In-game UI as UI & Simulation got some sub components.