ide: Fix bug where Ctrl-W didn't work correctly on help window when detached

- This fixes issue #996
- Thanks to Luca Danieli for contributing this fix

Signed-off-by: Scott Wilson <i@scottwilson.ca>
ide: Ctrl-w works properly when find box is selected

Signed-off-by: Scott Wilson <i@scottwilson.ca>
Merge pull request #1101 from supercollider/fix-ctrl-w

Fix ctrl-w