Readonly attribut on combo does not work

[rodo]

Hi, Here a substract of one of my presets :

<item name="Bladder" type="node">

<label text="Ajout d'un bladder" />
<key key="man_made" value="bladder" />
<combo key="water_type" text="* Type d'eau"

values="grey_water,drinking_water,industrial_water,unspecified"
display_values="eau brute,eau potable,eau industrielle,non precise"
en.display_values="grey_water,drinking_water,industrial_water,unspecified"
readonly="true"
required="true" />

I set a readonly attribute on some combo but when using my presets in JOSM 4006 the combo are still editable, I can put what I want in the value.

[stoecker]

There is no readonly attribute at all. It don't know why it is documented at TaggingPresets.

[rodo]

Thanks for your answer even if it's not make me happy ;-)
I fixed the wiki and add some notes about this ticket and the #409, it seems to be a long story this feature.
I'll open an enhancement ticket to keep in mind and hope to have these feature coded one day.