Some MyraPad fixes

Author: rds1983

src/MyraPad/UI/MainForm.cs

@@ -286,8 +286,8 @@ public MainForm(State state)
 			PropertyGrid.CustomSetter = RecordSetter;
 			PropertyGrid.Settings.AssetManager = MyraEnvironment.DefaultAssetManager;
 
-			_topSplitPane.SetSplitterPosition(0, state != null ? state.TopSplitterPosition1 : 0.25f);
-			_topSplitPane.SetSplitterPosition(1, state != null ? state.TopSplitterPosition2 : 0.75f);
+			_topSplitPane.SetSplitterPosition(0, state != null ? state.TopSplitterPosition1 : 0.2f);
+			_topSplitPane.SetSplitterPosition(1, state != null ? state.TopSplitterPosition2 : 0.6f);
 			_leftSplitPane.SetSplitterPosition(0, state != null ? state.CenterSplitterPosition : 0.5f);
 
 			UpdateMenuFile();
@@ -1645,7 +1645,7 @@ private void BuildExplorerTreeRecursive(ITreeViewNode node, IItemWithId root)
 			newNode.Tag = root;
 			newNode.IsExpanded = true;
 
-			var props = root.GetType().GetRuntimeProperties();
+			var props = root.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
 			var contentProperty = (from p in props where p.FindAttribute<ContentAttribute>() != null select p).FirstOrDefault();
 			if (contentProperty == null)
 			{