Fly, have you set your Group to be exported as a single image? Web Properties > Image > Group web export.

Ctrl+W still works for me when I am using the text tool. What document or application language are you using?
Command: Swap Case of next character - (Only applies in Text Tool); with the Selector tool, Ctrl+W is Close (Window); for Arrange Menu, Ctrl+W is Bring to Front...
There are probably other modes.

Acorn