Improved wire editing logic:

- wires have to be selected by clicking before any nodes can be moved
- wires can be selected by clicking either the nodes or the sections
- new nodes can be added by clicking a section while holding ctrl
- the selected wire is drawn on top of all other entities

Subsurface/Source/Screens/EditMapScreen.cs

@@ -1,4 +1,5 @@
-using Microsoft.Xna.Framework;
+using Barotrauma.Items.Components;
+using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
 using System;
@@ -920,6 +921,17 @@ namespace Barotrauma
                         me.IsHighlighted = false;
                     }
 
+                    if (wiringMode)
+                    {
+                        List<Wire> wires = new List<Wire>();
+                        foreach (Item item in Item.ItemList)
+                        {
+                            var wire = item.GetComponent<Wire>();
+                            if (wire != null) wires.Add(wire);
+                        }
+                        Wire.UpdateEditing(wires);
+                    }
+
                     if (dummyCharacter.SelectedConstruction==null)
                     {
                         Vector2 mouseSimPos = FarseerPhysics.ConvertUnits.ToSimUnits(dummyCharacter.CursorPosition);