graph_editor: fix css
Jérome Perrin authored
the .selected is too general and was applied to selected action tab in erp5_xhtml_style ui

(cherry picked from commit b4321199)

Conflicts:
	bt5/erp5_graph_editor/SkinTemplateItem/portal_skins/erp5_graph_editor/dream_graph_editor/jsplumb/jsplumb.css.css
3f48e34b