Name objects in Heidi icon

Hopefully those are the correct botanical names.
Add stem and leaves to the Heidi icon
Don't show stem and leaves at 16x16
Add the kawoosh icon to RemoteDesktop

TODO: change it for one of the simpler and less connoted version
before the release.

(but yesterday's vote on IRC was highly in favor of this one :P)
Add patchset as extension for text/x-patch

We don't have a separate type for them anyway.