First iteration on the 0.14 release notes

docs/release-notes/0.14.0.md

@@ -2,4 +2,32 @@
 
 # Features
 
+## Fine grained titlebar element overlay behavior
+
+The overlay behavior of the elements of the window titlebar can now be controlled individually.
+
+There are is now an enum with four values:
+- `Never`
+- `OverlayFlyout`
+- `OverlayHiddenTitleBar`
+- `Always`
+
+For more info, see PR #1427.
+
+## Underlined TabControl
+
+Added the attached property `ControlsHelper.IsUnderlined="True"` for the `TabControl` control that adds an underline.
+
+See PR #1425 for reference.
+
+# Changes
+- The `DropDownButton` now works less like a `SplitButton` #1442 #1459
+- Made a disabled Textbox, RichTextbox and PasswordBox a bit more visible #1410 #1420
+
 # Fixes
+
+- Don't focus window titlebar elements #1472 #1475
+- Fixed selection with SelectionUnit=CellOrRowHeader #1452
+- Fixed treeview style to allow custom styling #1444 #1450
+- Fixed the `Flyout`control opening again when clicking on a control under the overlay #1411 #1428
+- Better coloring for blackout days #1133 #1426