[sugar] Merging sugar-toolkit changes from tomeu repository

[Tomeu Vizoso]

This one cleans up the code in *ToolButton quite a bit, following
Marco's suggestions.

Thanks,

Tomeu
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-Add-support-for-accelerators-to-buttons.patch
Type: text/x-patch
Size: 13475 bytes
Desc: not available
Url : http://lists.laptop.org/pipermail/sugar/attachments/20080328/ee76d3d1/attachment.bin