Steps to Reproduce

1. click the button
2. check z-window-content's height

Current Result

no height specified

Expected Result

there is a height specified

Debug Information

• 9.0.0 doesn't have this bug
• users put a content-box inside window with height: 100%, if z-window-content has no height. The content-box height is also unexpected.
• the target to check the visibility changes between 9.0.0 and 9.0.1.2.

Workaround

• don't put the highlighted window into an invisible parent, win.setPage(parent.getPage())
• CSS
  since window might have title, so you need to subtract the height of the title
  .z-window-content { height: calc(100% - 40px); // the height of the title in your environment }

• win.setWidgetListener("onBind", "zWatch.fireDown('onSize', this)"); //fire onSize for ZK-5203