Set min widths of left & right panes in package manager doc window.
fix bug - NuGet 3.0 preview: UI marks to show package is prerelease
Create PackageItemControl.

Plus many small layout fixes.
fix bug - NuGet 3.0 preview: UI marks to show package is prerelease
add grid for better alignment
update XAML
fixes to make the clear button show up
Fix bug - here should be a clear (X) button inside the search bar
Merge branch 'danliu/bugfixes' of https://git01.codeplex.com/nuget into danliu/bugfixes

Conflicts:
	src/V3/NuGet.Client.VisualStudio.UI/Resources/Resources.resx