Drag changes (#2487)

* Drag changes

* Higlights only show near cursor
* Don't highlight un-droppable entities
* Fixes invalid highlights issue

* Also the scanner

* 2 months fix

* Address reviews

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Client/GameObjects/Components/Movement/ClimbingComponent.cs

@@ -4,6 +4,7 @@ using Robust.Shared.GameObjects;
 namespace Content.Client.GameObjects.Components.Movement
 {
     [RegisterComponent]
+    [ComponentReference(typeof(SharedClimbingComponent))]
     public class ClimbingComponent : SharedClimbingComponent
     {
         public override void HandleComponentState(ComponentState curState, ComponentState nextState)