Fix resize event dimensions on Windows

CHANGELOG

@@ -1,3 +1,6 @@
+v1.4.4 (WIP)
+- Fix resize event dimensions on Windows
+
 v1.4.3 (2020-02-13)
 - Add SetFocusedFunc to TreeNode
 - Add option to always show scroll bar

application.go

@@ -342,16 +342,17 @@ EventLoop:
 
 				a.lastResize = time.Now()
 
+				if screen == nil {
+					continue
+				}
+				screen.Sync()
+
 				// Call afterResize handler if there is one.
 				if a.afterResize != nil {
 					width, height := screen.Size()
 					a.afterResize(width, height)
 				}
 
-				if screen == nil {
-					continue
-				}
-				screen.Clear()
 				a.draw()
 			case *tcell.EventMouse:
 				atX, atY := event.Position()