wxGUI: fix another wx flag assertion error in iclass (#1471)

gui/wxpython/iclass/dialogs.py

@@ -705,10 +705,10 @@ class IClassSignatureFileDialog(wx.Dialog):
         btnSizer.Realize()
 
         sizer.Add(dataSizer, proportion=1,
-                  flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
+                  flag=wx.EXPAND | wx.ALL, border=5)
 
         sizer.Add(btnSizer, proportion=0,
-                  flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
+                  flag=wx.EXPAND | wx.ALL, border=5)
 
         self.panel.SetSizer(sizer)
         sizer.Fit(self)
@@ -805,10 +805,10 @@ class IClassExportAreasDialog(wx.Dialog):
         btnSizer.Realize()
 
         sizer.Add(dataSizer, proportion=1,
-                  flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
+                  flag=wx.EXPAND | wx.ALL, border=5)
 
         sizer.Add(btnSizer, proportion=0,
-                  flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
+                  flag=wx.EXPAND | wx.ALL, border=5)
 
         self.panel.SetSizer(sizer)
         sizer.Fit(self)