Some minor improvements in projects usage

Author: MDoerner

Rubberduck.CodeAnalysis/Inspections/Concrete/SheetAccessedUsingStringInspection.cs

@@ -96,7 +96,7 @@ private IVBComponent GetVBComponentMatchingSheetName(IdentifierReferenceInspecti
 
             var sheetArgumentContext = indexExprContext.argumentList().argument(0);
             var sheetName = FormatSheetName(sheetArgumentContext.GetText());
-            var project = State.Projects.First(p => p.ProjectId == reference.QualifiedName.ProjectId);
+            var project = State.ProjectsProvider.Project(reference.QualifiedName.ProjectId);
 
             using (var components = project.VBComponents)
             {

Rubberduck.Core/UI/Inspections/InspectionResultsViewModel.cs

@@ -620,7 +620,7 @@ private bool CanExecuteCopyResultsCommand(object parameter)
             return !IsBusy && _resultsAll != null && _resultsAll.Any();
         }
 
-        public Visibility EmptyUIRefreshVisibility => _state.Projects.Count > 0 ? Visibility.Hidden : Visibility.Visible;
+        public Visibility EmptyUIRefreshVisibility => _state.ProjectsProvider.Projects().Any() ? Visibility.Hidden : Visibility.Visible;
 
         public Visibility EmptyUIRefreshMessageVisibility => IsBusy ? Visibility.Hidden : Visibility.Visible;
 

Rubberduck.Parsing/VBA/RubberduckParserState.cs

@@ -423,7 +423,7 @@ public void SetModuleState(QualifiedModuleName module, ParserState state, Cancel
             if (AllUserDeclarations.Any())
             {
                 var projectId = module.ProjectId;
-                IVBProject project = GetProject(projectId);
+                var project = GetProject(projectId);
 
                 if (project == null)
                 {

Rubberduck.Parsing/VBA/StateProjectManagerBase.cs

@@ -11,7 +11,7 @@ public abstract class StateProjectManagerBase : IProjectManager
         private readonly RubberduckParserState _state;
         private readonly IVBE _vbe;
 
-        public StateProjectManagerBase(
+        protected StateProjectManagerBase(
             RubberduckParserState state,
             IVBE vbe)
         {