Rename RichTextToolbar$Strings.properties to RichTextToolBar_Strings.properties to avoid shell escaping issues.

Review at http://gwt-code-reviews.appspot.com/968802

Review by: fabbott@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9026 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/samples/showcase/src/com/google/gwt/sample/showcase/client/content/text/RichTextToolbar$Strings.properties b/samples/showcase/src/com/google/gwt/sample/showcase/client/content/text/RichTextToolbar_Strings.properties
similarity index 100%
rename from samples/showcase/src/com/google/gwt/sample/showcase/client/content/text/RichTextToolbar$Strings.properties
rename to samples/showcase/src/com/google/gwt/sample/showcase/client/content/text/RichTextToolbar_Strings.properties