codemirror: just use anyword autocomplete anywhere

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

bt5/erp5_code_mirror/SkinTemplateItem/portal_skins/erp5_code_mirror/code_mirror_support.xml

@@ -529,6 +529,13 @@
  if(parent_height !== undefined && parent_height > (300 * 0.8)) {\n
    cm.setSize(undefined, parent_height);\n
  }\n
+\n
+\n
+  CodeMirror.commands.autocomplete = function(cm) {\n
+    CodeMirror.showHint(cm, CodeMirror.hint.anyword, {\n
+    } );\n
+  }\n
+\n
 \n
  updateErrorWarningMessageDivWithJump();\n
 \n