wx.metadata: fix create/edit map metadata with g.gui.metadata module (#…

…890)

* Fix wx.TextCtrl widget init parent window parameter argument.
* sashPosition parameter argument for wx.SplitterWindow SplitHorizontally
method must be int type. Use default parameter argument is 0, half of
the total window width.

Fix for Python 3.10, wxPython 4.2.0 version.

src/gui/wxpython/wx.metadata/g.gui.metadata/g.gui.metadata.py

@@ -1121,7 +1121,7 @@ def initEditor(
 
             self.ntbRight = NotebookRight(self.splitter, self.xmlPath)
 
-            self.splitter.SplitVertically(self.editor, self.ntbRight, sashPosition=0.65)
+            self.splitter.SplitVertically(self.editor, self.ntbRight)
             self.splitter.SetSashGravity(0.65)
             self.leftPanel.Hide()
             self.Hsizer.Add(self.splitter, proportion=1, flag=wx.EXPAND)
@@ -1658,7 +1658,7 @@ class MdValidator(wx.Panel):
     def __init__(self, parent):
         wx.Panel.__init__(self, parent=parent, id=wx.ID_ANY)
         self.text = wx.TextCtrl(
-            parent,
+            self,
             id=wx.ID_ANY,
             size=(0, 55),
             style=wx.VSCROLL