Debugger: relies on HTTP_HOST and php_uname (for CLI), SERVER_NAME is not used
Revert "Debugger: removed unused CSS"

This reverts commit 86c26a11d12445ba7411caddf03638950cff1f65.

CSS is used by window-mode.
Debugger: fixed calling of invalid function initToggle(), removed in 7929160eb
Debugger: fixed saving position on new floating panel
tests: added messages to skip()