update simple widgets to new widget layouts

Signed-off-by: Lukas Hrazky <lukkash@email.cz>
Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/widget/graph.lua.in

@@ -217,6 +217,7 @@ function new(args)
     local graph = {}
     graph.widget = capi.widget(args)
     graph.widget.resize = false
+    graph[1] = graph.widget
 
     data[graph] = { width = width, height = height, values = {}, max_value = 1 }
 

lib/awful/widget/progressbar.lua.in

@@ -170,6 +170,7 @@ function new(args)
 
     pbar.widget = capi.widget(args)
     pbar.widget.resize = false
+    pbar[1] = pbar.widget
 
     data[pbar] = { width = width, height = height, value = 0 }
 

lib/awful/widget/prompt.lua.in

@@ -34,6 +34,7 @@ function new(args)
     args.type = "textbox"
     promptbox.widget = capi.widget(args)
     promptbox.widget.ellipsize = "start"
+    promptbox[1] = promptbox.widget
     promptbox.run = run
     promptbox.prompt = args.prompt or "Run: "
     promptbox.layout = args.layout or layout.horizontal.leftright