refactor main window view; add builds shortkey
Merge branch 'master' of https://github.com/EmmittJ/PoESkillTreeSource

Conflicts:
	WPFSKillTree/Views/MainWindow.xaml
	WPFSKillTree/Views/MainWindow.xaml.cs
make rightclick on attribute list highlit items on a tree
ignore POESKillTree.exe.config
fix empty tree screenshoting
add highlight of attribute on attribute list rightclicking
change border color
add another  row on mainwindow so buttons have a background
1. Merge remote-tracking branch 'upstream/master'

Conflicts:
	WPFSKillTree/Views/MainWindow.xaml
	WPFSKillTree/Views/MainWindow.xaml.cs

2. fixed an issue with "Download items" popup on light theme
udate search when mouse leave attribute list
save/load expanders state on exit/load
Merge pull request #17 from nastynyan/master

* reworked UI a bit
* highlight attributes on right-click
* fixed crash with empty tree sreenshoting