Implement more new styling stuff.

Content.Client/UserInterface/NanoHeading.cs

@@ -0,0 +1,41 @@
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.Maths;
+
+namespace Content.Client.UserInterface
+{
+    public class NanoHeading : Container
+    {
+        private readonly Label _label;
+        private readonly PanelContainer _panel;
+
+        public NanoHeading()
+        {
+            _panel = new PanelContainer
+            {
+                Children = {(_label = new Label
+                {
+                    StyleClasses = {NanoStyle.StyleClassLabelHeading}
+                })}
+            };
+            AddChild(_panel);
+
+            SizeFlagsHorizontal = SizeFlags.None;
+        }
+
+        public string Text
+        {
+            get => _label.Text;
+            set => _label.Text = value;
+        }
+
+        protected override Vector2 CalculateMinimumSize()
+        {
+            return _panel.CombinedMinimumSize;
+        }
+
+        protected override void SortChildren()
+        {
+            FitChildInBox(_panel, SizeBox);
+        }
+    }
+}