- Dvorak layout
- Support xkb variants
- focus indication
- popup window merge from GKB_UNSTABLE_2_2 branch
- help merge from the GKB_UNSTABLE_2_2 branch
- default layout saving to ~/.mate2/gkb_keymap for example
- loading and saving user defined keyprops to user space (~/.mate2/gkb/)
- add button disabling in prop-add.c by default (selected signal -> enabling
  the add button)
- is this neccessary to open a new window to prop-add?
- flags in prop-add (with gtk-tree-model?)