Better structure of ReportSettings in PropertyGrid
BaseDataItem
DataItem + DataItemDesigner
Rectangle + ContainerDesigner
Fix #422 - Unable to install Microsoft.CodeAnalysis NuGet package

If a package has only dependencies on other packages and no other
content then treat the package as project package and not as a
solution package.
Fix #426: Closing solution doesn't remove solution node from ClassBrowser
Merge branch 'master' of github.com:icsharpcode/SharpDevelop
Disable Debug -> Add watch expression if no text selected
Add icon for Debug -> Add watch expression
Merge pull request #432 from linquize/add-watch-expression

Changes to Add watch expression