wxGUI: change default command dialog style on Linux (merge from trunk, https://trac.osgeo.org/grass/changeset/65716)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@65717 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/core/settings.py

@@ -144,7 +144,7 @@ class Settings:
                     'type' : 'grass'
                     },
                 'commandNotebook' : {
-                    'selection' : 0
+                    'selection' : 0 if sys.platform in ('win32', 'darwin') else 1
                     },
                 },
             #