Daniel/450 readonly disabled for textarea

[djyotta]

Closes #450

Tested with this:

SELECT 'form' AS component, 'post' AS method;
SELECT 'select' AS type
, json('[
  { "label": "a", "value": "a", "selected": true },
  { "label": "b", "value": "b", "selected": false },
  { "label": "c", "value": "b", "selected": true },
]') AS options
, TRUE AS multiple
, TRUE AS dropdown
, TRUE AS readonly
, 's' AS name
;
SELECT 'textarea' AS type
, 'abc' AS value
, 'ta' AS name
, TRUE AS readonly
;

• disabled works fine for textarea and select and dropdown select
• readonly works fine for textarea but not for dropdown select, so I removed implementation of readonly on select altogether

[djyotta]

No problem. I really needed this feature.