Updating Showcase to use LayoutPanels throughout the hierarchy, thus implementing ProvidesResize down to the examples.  This allows the examples to look better, especially examples that implement RequiresResize. Most of the example look the same, but TabLayoutPanel and SplitLayoutPanel now take up a larger area to illustrate how they would be used in most apps.

This change Also modifies ContentWidget to use SafeHtml instead of a String html for the example descriptions, and fixes some warnings in Showcase.

Review at http://gwt-code-reviews.appspot.com/1409801

Review by: pdr@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9960 8db76d5a-ed1c-0410-87a9-c151d255dfc7
13 files changed