Fix problem with decreasing size of StatusToolBar when tools are removed from toolbar.

StatusToolBar - toolbar with tool to build, clear, connect, ...
This problem appears only in python-wxgtk3.0. In python-wxgtk2.8 there
was not such problem.

If call StatusToolBar.SetMinSize(wx.DefaultSize), all is working, but
following warning message appears:

(Beremiz.py:15155): Gtk-WARNING **: 18:42:24.115: Negative content
width -6 (allocation 1, extents 4x3) while allocating gadget (node
toolbar, owner GtkToolbar)

To avoid that StatusToolBar.GetToolBitmapSize() is used instead of wx.DefaultSize

include yslt.yml2

in xsl {
    decl istylesheet (
        *output="xml",
        version="1.0",
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform",
        xmlns:exsl='http://exslt.org/common',
        extension-element-prefixes='exsl'
    ) alias stylesheet {
        output *output;
        content;
    };

    decl template(match) {
        content;
    };

    decl function(name) alias template {
        content;
    };
   
    decl call(name) alias call-template {
        content;
    };

    decl apply(select) alias apply-templates {
        content;
    };
}