fix cases where project inspectors were not cleared

revealed by project groups, and it was confusing.

src/ce_dubprojeditor.pas

@@ -204,7 +204,11 @@ begin
   fProj := nil;
   enabled := false;
   if aProject.getFormat <> pfDub then
+  begin
+    updateEditor;
+    updateInspector;
     exit;
+  end;
   fProj := TCEDubProject(aProject.getProject);
   enabled := true;
   if not Visible then

src/ce_projinspect.pas

@@ -183,7 +183,10 @@ begin
   enabled := false;
   fLastFileOrFolder := '';
   if aProject.getFormat <> pfNative then
+  begin
+    updateImperative;
     exit;
+  end;
   enabled := true;
   //
   fProject := TCENativeProject(aProject.getProject);