Added horizontal bars to UI components.

src/ui/layout.lua

@@ -23,7 +23,7 @@ function Layout:_init(x, y, w, h, spacing, float)
     self.y        = y ~= nil and y or 0
     self.w        = w
     self.h        = h
-    self.s        = spacing ~= nil and spacing or 10
+    self.spacing  = spacing ~= nil and spacing or 10
     self.elements = {}
 end