Fix fullscreen command for floating alacritty window

Steps to reproduce:
1. `layout floating` for alacritty window
2. run `aerospace fullscreen`

Expected: the window takes the whole screen
Actual: the window is moved, but not resized

Should also _fix #335

A follow up on 35143f7 and
#143

Sources/AppBundle/tree/Window.swift

@@ -64,6 +64,7 @@ extension Window {
         var result: Bool = true
         if let size { result = setSize(size) && result }
         if let topLeft { result = setTopLeftCorner(topLeft) && result }
+        if let size { result = setSize(size) && result }
         return result
     }