Hob GUI tweaks

All,

Here are some tweaks to the Hob GUI.

Firstly I include a tweaked version of my recent LayerSelectionDialog patch, this includes Dongxiao's suggestion to use a prelight on the clickable pixbuf in the TreeView. Sadly on Ubuntu this isn't hugely noticable as the remove icon is largely whitespace.
We should be able to replace the stock icon with a custom one soon.

The second patch adds a clear button to the search entry in HobNoteBook, per a suggestion I made whilst reviewing that code.

The remaining three patches are for the PersistentTooltip widget:
1) Tweak borders so that the button is aligned with the tooltip edge but the label remains inside padding.
2) Fix colours on darker Gtk+ themes, such as those used in Ubuntu Unity.
3) Fix whitespace to match the rest of BitBake (I had accidentally used tabs rather than 4 spaces per indent).

Cheers,
Joshua

The following changes since commit b7b7c768761d205bc5a60922ff709c9c184d4158:

utils: Add split_version function for splitting a version into its components (2012-03-20 14:37:16 +0000)

are available in the git repository at:
git://github.com/incandescant/bitbake josh/hob
https://github.com/incandescant/bitbake/tree/josh/hob
git://git.yoctoproject.org/poky-contrib josh/hob
http://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/log/?h=josh/hob

Joshua Lock (5):
ui/crumbs/hig: make the layer selection dialogue more closely match
design
ui/crumbs/hobwidget: add clear icon to search entries in HobNotebook ui/crumbs/persistenttooltip: tweak borders ui/crumbs/persistenttooltip: fix colours on darker themes ui/crumbs/persistenttooltip: fix whitespace

 lib/bb/ui/crumbs/hig.py               |   97 ++++++++++---
 lib/bb/ui/crumbs/hobwidget.py         |   19 ++-
 lib/bb/ui/crumbs/persistenttooltip.py |  244 ++++++++++++++++++---------------
 3 files changed, 221 insertions(+), 139 deletions(-)

1.7.7.6