add dummy span widgets & make clock count on seconds

widget.lua

@@ -276,6 +276,17 @@ function HorizontalGroup:free()
 	WidgetContainer.free(self)
 end
 
+--[[
+Dummy Widget that reserves horizontal space
+]]
+HorizontalSpan = Widget:new{
+	width = 0,
+}
+
+function HorizontalSpan:getSize()
+	return {w = self.width, h = 0}
+end
+
 --[[
 A Layout widget that puts objects under each other
 ]]
@@ -324,6 +335,17 @@ function VerticalGroup:free()
 	WidgetContainer.free(self)
 end
 
+--[[
+Dummy Widget that reserves vertical space
+]]
+VerticalSpan = Widget:new{
+	width = 0,
+}
+
+function VerticalSpan:getSize()
+	return {w = 0, h = self.width}
+end
+
 --[[
 an UnderlineContainer is a WidgetContainer that is able to paint
 a line under its child node