Sort files in solution by file name without extension.
[Refactoring] Improved code action & issue panel.
Merge branch 'constructorInitializer' of github.com:DavidKarlas/monodevelop into DavidKarlas-constructorInitializer

Conflicts:
	main/external/nrefactory
[SourceEditor] Enabled flat style background on task overview on
windows again.
[Ide] Fixed possible null reference exception.
[Xml] Don't offer children in MSBuild attribute completion
[Refactoring] Fix title alignment in code issues panel
[SourceEditor] Re-Windowsify source analysis scrollbar
[SourceEditor] Compute tooltips when needed, not on every mouse event
[SourceEditor] Implement drag support for source analysis scrollbar
Fixed 'Bug 17945 - Bad 'unnecessary cast' warning'.
Fixed 'Bug 17952 - Autocomplete when keywords are used'.
[SourceEditor] Flatten quick task gradient background again.
[Refactoring] Implemented new code issue panel design.
[NuGet] Fix build.
[NuGet] Show Add Packages dialog when Packages node double clicked.

Double clicking Packages in Solution pad now opens the Add Packages
dialog making it consistent with the way that Project Options
dialog and the Edit References dialog can be opened.
Merge remote-tracking branch 'origin/master' into retina

Conflicts:
	main/src/addins/MonoDevelop.Refactoring/MonoDevelop.CodeActions/CodeActionWidget.cs
	main/src/addins/MonoDevelop.SourceEditor2/MonoDevelop.SourceEditor.QuickTasks/QuickTaskOverviewMode.cs
	main/src/core/MonoDevelop.Ide/ExtensionModel/StockIcons.addin.xml
	main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.csproj
Bump md-addins
[TextEditor] Corrected source analysis indicator color alpha values.
[NuGet] Update Add Package button when multiple packages checked.

Change label to Add Packages when more than one package is checked.
Disable Add Package button when no packages are selected.