Update index.theme
updated: icon theme name change and updated inherits.
added: initial kororification of gitk icon.

(cherry picked from commit 047b270023d9c09add754f0c341a2763a4bac95c)
added: new qt4-logo alias for qt4logo icon.

(cherry picked from commit eaaa9c0493c9a3ff4109e11dca59fcda02840191)
added: kororified lash icon.
added: kororified openscad icon.
added: kororified welcome icon.
added: kororified pharlap icon.
added: kororified five-or-more icon
added: new ardour alias for ardour2.