Added rebuild region key on desktop

core/src/mindustry/input/InputHandler.java

@@ -1165,13 +1165,17 @@ public abstract class InputHandler implements InputProcessor, GestureListener{
     }
 
     protected void drawSelection(int x1, int y1, int x2, int y2, int maxLength){
+        drawSelection(x1, y1, x2, y2, maxLength, Pal.accentBack, Pal.accent);
+    }
+
+    protected void drawSelection(int x1, int y1, int x2, int y2, int maxLength, Color col1, Color col2){
         NormalizeDrawResult result = Placement.normalizeDrawArea(Blocks.air, x1, y1, x2, y2, false, maxLength, 1f);
 
         Lines.stroke(2f);
 
-        Draw.color(Pal.accentBack);
+        Draw.color(col1);
         Lines.rect(result.x, result.y - 1, result.x2 - result.x, result.y2 - result.y);
-        Draw.color(Pal.accent);
+        Draw.color(col2);
         Lines.rect(result.x, result.y, result.x2 - result.x, result.y2 - result.y);
     }
 
@@ -1486,6 +1490,10 @@ public abstract class InputHandler implements InputProcessor, GestureListener{
         return false;
     }
 
+    public boolean isRebuildSelecting(){
+        return input.keyDown(Binding.rebuild_select);
+    }
+
     public float mouseAngle(float x, float y){
         return Core.input.mouseWorld(getMouseX(), getMouseY()).sub(x, y).angle();
     }