Setting layout.css.devPixelsPerPx to 1.0 if native events are enabled only. Fixes issue 7445
On behalf of johannes@brodwall.com: Fixing the list of extensions to search for an executable on Windows, and logging process startup errors. Fixes issue 7514
Setting forwarded content for CommandListener afterCommand handler. Fixes issue 7443

Signed-off-by: Alexei Barantsev <barancev@gmail.com>