Badly positioned password field which is dynamically shown

[dsgh]

This bug is visible when using one of the placeholder support plugins: mathiasbynens/jquery-placeholder

The plugin hides the true password input and shows a different 'fake' password input. When you tab into it, the 'fake' password input is hidden, and the real one is shown.

If the inputs are styled with rounded borders, then the true password input is sometimes rendered with the wrong coordinates (0, 0).

Here's a posible fix, against 1.0beta5. Not sure if still applies in master:

diff --git a/sources/RootRenderer.js b/sources/RootRenderer.js
index 883ad78..432edf5 100644
--- a/sources/RootRenderer.js
+++ b/sources/RootRenderer.js
@@ -60,7 +60,8 @@ PIE.RootRenderer = PIE.RendererBase.newRenderer( {
             s.left = x;
             s.top = y;
             s.zIndex = tgtPos === 'static' ? -1 : tgtCS.zIndex;
-            this.isPositioned = true;
+            var vis = this.styleInfos.visibilityInfo.getProps();
+            this.isPositioned = vis.visible && vis.displayed;
         }
     },