codemirror: just use anyword autocomplete anywhere

codemirror python's completion just complete on builtins, so that hack is a bit better

XXX the best would be to have both suggestions

bt5/erp5_code_mirror/SkinTemplateItem/portal_skins/erp5_code_mirror/code_mirror_support.txt

@@ -506,6 +506,10 @@
    cm.setSize(undefined, parent_height);
  }
 
+ CodeMirror.commands.autocomplete = function(cm) {
+   CodeMirror.showHint(cm, CodeMirror.hint.anyword, {range: Infinity} );
+ }
+
  updateErrorWarningMessageDivWithJump();
 
  // When hovering editor element with the mouse, seeing the title of the field is annoying...