core-field element broken on Polymer Designer

[stevendesu]

Testing on Windows 7 SP 1 with Chrome v46.0.2490.86

I was messing around with the Polymer Designer for the first time ever after watching the Google I/O 2014 video about Polymer -- and so far I'm loving it. Although after a very short while I encountered a pretty aggravating bug.

When I drag a core-field into the design area, the core-input child element is not visible nor functional:

The placeholder and value attributes simply don't work. I cannot bind to these or edit them. I cannot click on the input and the input is not functional when I preview the page. By add a padding to the input you can see that it's still there but simply condensed to zero height:

For the time being I have found the following work-around:

1. Drag a core-field element into the design area
2. Select the core-input element in the tree view and delete it
3. Drag a core-input element into the core-field

It's only core-field that is broken, so by adding a new core-input everything works perfectly:

[justinfagnani]

Unfortunately we're not supporting the version of designer that's hosted anymore. All of our work is being done on a new version ("Designer 2"). The old version is kept up to allow access to elements already created. We do need to add a deprecation notice.