Minor UI refactor (#11212)

Content.Client/UserInterface/Controls/ProgressTextureRect.cs

@@ -0,0 +1,20 @@
+using Content.Client.DoAfter;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface.Controls;
+
+namespace Content.Client.UserInterface.Controls
+{
+    public sealed class ProgressTextureRect : TextureRect
+    {
+        public float Progress;
+
+        protected override void Draw(DrawingHandleScreen handle)
+        {
+            var dims = Texture != null ? GetDrawDimensions(Texture) : UIBox2.FromDimensions(Vector2.Zero, PixelSize);
+            dims.Top = Math.Max(dims.Bottom - dims.Bottom * Progress,0);
+            handle.DrawRect(dims, DoAfterOverlay.GetProgressColor(Progress));
+
+            base.Draw(handle);
+        }
+    }
+}