Close #1938 Problem with window size

Author: punker76

docs/release-notes/1.5.0.md

@@ -28,3 +28,4 @@
 - [#2877](https://github.com/MahApps/MahApps.Metro/issues/2877) Can't bind to ShowTitleBar
 - [#2871](https://github.com/MahApps/MahApps.Metro/issues/2871) SplitButton CornerRadius
 - [#2862](https://github.com/MahApps/MahApps.Metro/issues/2862) Flyout close button icon is incorrect when setting flow direction right to left
+- [#1938](https://github.com/MahApps/MahApps.Metro/issues/1938) Problem with window size