Fix server freeze on client absence.
Mods.Common Widgets

Moved over Widgets that don't require a bunch of things to move.
Add support for generic tooltip names.
Add classic-style tooltips for TD campaign missions.
Fix bogus fence tooltip.
Add classic-style tooltips for RA campaign missions.
Update CurrentAdjacentCells when actor is added to the world.  Fixes #6633.
Some minor Cargo style fixes.
Merge pull request #6632 from steelphase-forks/common-widgets

Mods.Common Widgets
Move Explosion effect to Mods.Common
Move FloatingText effect to Mods.Common
Move Console commands to Mods.Common
Balancing: Reduced Commando HP
Fix map.png lock
Turrets now realign when not attacking.
Add WithRangeCircle trait for drawing arbitrary ranges.
Add proximity trigger plumbing.
Add UpgradeActorsNear trait for passive upgrades.
Add the stealth generator to TS.
Extend INotifyOtherProduction to all actors.